Please or to access all these features

AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To think "half your age plus seven" is a massive pile of nonsense?

370 replies

TransportNerd · 01/07/2026 08:07

Mumsnet seems to take a very dim view of age gap relationships, far more so than I think the general population does. I've seen plenty of age gap relationships work just fine.

Every single time they're discussed here, though, someone wheels out the "rule" that you shouldn't date someone younger than half your age plus seven years.

People treat it like it's absolutely set in stone, and that breaking this "rule" is some sort of disgusting taboo. I've even seen someone argue it should be enshrined in law, with penalties for those who break it.

Personally, I've always thought it was complete nonsense. It was simply something in a French novel in the early 1900s. It doesn't really take anything important into account, and ignores the principle that consenting adults can do what they like.

Quite apart from anything else, why is it plus seven? Why not five, eight or ten? I'm sure it's only seven because that's a number that's had mystic significance since ancient times. Not a good basis for making laws!

Anyway:

YABU - yes, it's a rule and shouldn't be broken
YANBU - it's a big pile of nonsense and doesn't mean anything

OP posts:
MrsPositivity1 · 02/07/2026 21:59

I’m 58 hubby is 81. Married 25 years 2 kids. He is fitter than I am and still working full time (his own company) He is the best husband I could ask for.

aeroplaneoverthesea · 02/07/2026 21:49

TransportNerd · 02/07/2026 21:38

No, it was the one with a 37 year old man dating a 66 year old woman. I'm not appalled or disgusted by either that relationship, or yours. Haha.

I won't judge anyone's relationships, and I don't understand why so many people seem determined to do so.

Good on you. :)

I think the only problem I can see is if it becomes serious. Sensibly a mid forties man isn’t likely to want to be with a mid seventies woman, which I think is completely understandable.

My situation is a more casual one, although it is exclusive. And I have to say I’m having the time of my life 😉

coocoocachoop · 02/07/2026 21:48

Even if you push the ick and power imbalance stuff aside I just don’t understand how it doesn’t play on the mind of the younger one…I often find myself thinking to the future and in my darkest moments fearing my husband dying and life without him, and we are the same age. A big age gap would play on my mind all the time. Not to mention wondering when our lives would slow down. I’d feel quite guilty as the older one too.

Deepf60 · 02/07/2026 21:41

OonaStubbs · 01/07/2026 15:48

I have always thought that half your age plus seven should be the law.

Give your head a wobble! You can't make laws like that I have a 23 year gap my male partner is the younger!

Deepf60 · 02/07/2026 21:39

OutOfApricots · 01/07/2026 14:43

If you're old enough to be someone's parent... ew.

Wow! Judgmental! My partner of 5 years is 51....I'm 74 best relationship I've ever had. Don't knock what we have

TransportNerd · 02/07/2026 21:38

aeroplaneoverthesea · 02/07/2026 21:30

I’m wondering if that’s my thread you’re talking about. I’m a 50 year old woman in a FWB situation with a 25 year old man. He is mature for his age and we have great fun together. We bring out the best in each other and not only sexually.

As I said on my thread, I’m not coercing him or grooming him, it’s a mutually beneficial situation. We’re both consenting adults and boundaries have been set. We have regular discussions to make sure we’re both still comfortable. We’re safe and sensible. He’s more thoughtful and considerate than any man I’ve been with who’s my age.

If people have a problem with that then so be it. I do accept not all relationships are like the one I’m in, and there can be an inbalance.

No, it was the one with a 37 year old man dating a 66 year old woman. I'm not appalled or disgusted by either that relationship, or yours. Haha.

I won't judge anyone's relationships, and I don't understand why so many people seem determined to do so.

Good on you. :)

OP posts:
Doggymummar · 02/07/2026 21:34

It's just a jokey comment

aeroplaneoverthesea · 02/07/2026 21:30

TransportNerd · 01/07/2026 08:15

But there's been a recent thread on here with an older woman and younger man, and people hated that as well.

I’m wondering if that’s my thread you’re talking about. I’m a 50 year old woman in a FWB situation with a 25 year old man. He is mature for his age and we have great fun together. We bring out the best in each other and not only sexually.

As I said on my thread, I’m not coercing him or grooming him, it’s a mutually beneficial situation. We’re both consenting adults and boundaries have been set. We have regular discussions to make sure we’re both still comfortable. We’re safe and sensible. He’s more thoughtful and considerate than any man I’ve been with who’s my age.

If people have a problem with that then so be it. I do accept not all relationships are like the one I’m in, and there can be an inbalance.

MyGrains · 02/07/2026 21:30

BuildbyNumbere · 02/07/2026 21:05

Nor should they … amazing how some people are so invested in other people’s choices

I have not given it any thought since the last thread on it! But the OP asked a question so here I am.

If a 30y old man wanted to date my 18y old daughter, I would however be invested as hell.

Deepf60 · 02/07/2026 21:27

MumsTheWordYouKnow · 02/07/2026 18:30

Personally any gap of adults beyond 7 years is serious ick to me, power imbalance.

What absolute rubbish.

Deepf60 · 02/07/2026 21:26

capricorn12 · 01/07/2026 09:26

I think a better rule would be if your'e old enough to be their parent, leave well alone.

Rubbish. I've been with a man 23 years younger than me for over 5 years best relationship I've ever had

JayJayj · 02/07/2026 21:10

I’ve never heard of this rule. I just think it’s gross when a 30 year old wants to get with someone barely past a teen. It screams creep and controlling. They want some to manipulate.

NeverLookInTheMirror · 02/07/2026 21:08

There are age gaps though and then there are generation gaps.

There’s a vast difference for instance between a couple with a 10/15 year age gap, and a couple with an age gap which spans decades.

As for power imbalances, they can go both ways. While it can be argued that an older person has a greater power over a younger one, gold diggers really are a thing.

You will never convince me that the younger women who end up with these aging rock stars are in it for anything more than the money.

BuildbyNumbere · 02/07/2026 21:05

MyGrains · 02/07/2026 18:42

Fortunately for you, my thoughts won’t affect anyone entering one of these creepy relationships.

Nor should they … amazing how some people are so invested in other people’s choices

gingangirly · 02/07/2026 21:00

Ewww. I’m 66, so anyone over 40 is acceptable? That’s the same age as my son. That’s a horrible thought.

MummyWillow1 · 02/07/2026 20:57

As long as both people are happy and have their eyes open then why is it anyone else’s business?

I was 18 when I met my husband, he was 26. We’ve been together 27 years and married for 19 years.

Groveland28 · 02/07/2026 20:54

Love hearing this.
It really does work
Living proof here

SourPenguin · 02/07/2026 20:51

OneShyQuail · 01/07/2026 09:31

13 year age gap here. Female older than male.
Best relationship ive ever been in.
Age is just a number.
I know men my age who dont have the maturity and emotional intelligence, work ethic, empathy, kindness, compassion and communication skills my DP has.

He is an old soul and couldnt find a deep connection with anyone his age.

We dont give two flying fucks what anyone thinks... 2 years in and going strong.... p.s you wouldn't tell there was a big age gap if you saw us together 🤭

15 years here. DH is the younger one and also best relationship for either of us. Neither of us really give a damn what anyone thinks tbh. We’re incredibly happy.

Groveland28 · 02/07/2026 20:47

My husband is 18 years younger than me.
Been together 19yrs married 14yrs
I rest my case

RoseOliviaAu · 02/07/2026 20:46

Yes I do because it would mean I could date someone age 22. In my 30s… gross

Frazzled89 · 02/07/2026 20:43

The age gap when I first met my husband would have been too big according to this rule (24 and 41) but is fine now we're older. If the younger one is still a teenager it's definitely creepy tbh, but past say the early 20s, people are old enough to make that decision. It may not always work out, but it's sometimes there mistake to learn. And many age gap relationships do work out.

saraclara · 02/07/2026 20:22

Dreamyposter · 02/07/2026 18:29

Obviously I'd have been horrified if my own daughters had bright home a 55 year old partner when they were 21 though!

If you claim your parents had been blissfully happy then I am curious why this would have bothered you so much?

Because there's a big difference between an age gap of 19 years and an age gap of 34 years?

TransportNerd · 02/07/2026 20:13

likelysuspect · 02/07/2026 19:10

Absolute rubbish

Posters on this forum are obsessed with supposed power imbalances and love to throw around the word vulnerable.

Yeah, for a site full of supposed feminists, there's a lot of people here who think women under 25 are weak, vulnerable and incapable of making sensible choices for themselves.

OP posts:
coocoocachoop · 02/07/2026 20:13

ChillingWithMySnowmies · 02/07/2026 19:20

I've done it both ways (ooh, get me) i've ben the younger by 13 years.. 20 & 33 when we met, no it didn't work out. massive power balance and abuse issues, divorced when i was 36 after he couldn't handle adult, assertive me who told him to get to fuck more often than not. We actually co-parent better since we divorced and he finally realised 40+ me doesn't take his shit.

I've also been 13 years older than my partner. He appeared when i was 38 and he was just 25. and i turned him down flat and cited what i'd been through
3 years later he was back with his own home, a degree, a high stress professional medical career, no desire for marriage/kids, and an absolute determination, and spent a year chasing before i gave in.. and i had the BEST 2 years of my life. He is still a brilliant friend (occasionally with benefits) but my health put paid to the official relationship as i'm a wheelchair user and the driving became too much to navigate.

The age is irrelevant, it's down to maturity. Yes of course age can be an issue down the line, but it shouldn't stop what can be an amazing connection and a life together.

Age gets more complex than maturity as health risks increase and retirement beckons. I had a friend with a 6 year gap struggle at how her and her husband’s lives were differing when he retired.

ChillingWithMySnowmies · 02/07/2026 19:20

I've done it both ways (ooh, get me) i've ben the younger by 13 years.. 20 & 33 when we met, no it didn't work out. massive power balance and abuse issues, divorced when i was 36 after he couldn't handle adult, assertive me who told him to get to fuck more often than not. We actually co-parent better since we divorced and he finally realised 40+ me doesn't take his shit.

I've also been 13 years older than my partner. He appeared when i was 38 and he was just 25. and i turned him down flat and cited what i'd been through
3 years later he was back with his own home, a degree, a high stress professional medical career, no desire for marriage/kids, and an absolute determination, and spent a year chasing before i gave in.. and i had the BEST 2 years of my life. He is still a brilliant friend (occasionally with benefits) but my health put paid to the official relationship as i'm a wheelchair user and the driving became too much to navigate.

The age is irrelevant, it's down to maturity. Yes of course age can be an issue down the line, but it shouldn't stop what can be an amazing connection and a life together.

Swipe left for the next trending thread