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1st cousin marriage

1000 replies

Wiseplumnet · 26/08/2026 16:00

AIBU to ask your opinion on 1st cousin marriage?.I have read that the government is looking to ban it. I know it is more prevelent ( but declining) in the UK among people of Asian origin. I am not coming from a judgemental or racist angle. I am just interested to know how mum'snetters of all ethnicities feel about marriage between 1st cousin's. I know it used to be more common in the west at one time, apart from keeping money/property in families, people travelled less widely, so there was less choice of marriage partners.I worked with a girl ( White British) who was in a secret relationship with her 1st cousin and they are very reluctant to tell their family, so there seems to be a cultural taboo in 1st cousins being romantically involved.Genetic factors resulting in disabilities (statistically twice as many as in unrelated parents) is sometimes given as a reason for banning cousin marriage, however we have genetic screening now, and disabilities aren't always serious.As so many babies died in infancy before we had vaccines, better health care etc , it was probably difficult to differentiate whether the close relationship between parents was the cause of any disabilities their children . Speaking for myself,I can't imagine wanting to marry any of the cousins I was brought up with as they seem more like brothers to me, but I could understand why someone may be attracted to a 1st cousin who they first met as adults. Or does it give you the instant 'Yuk' ? Also is banning 1st cousin marriage the same as banning 1st cousin sexual relationships and children, or would that become illegal? Maybe there's no need for a legal ban as the tradition will just die out over time

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Zov · 30/08/2026 18:23

End.

Zov · 30/08/2026 18:23

Oh the thread is at an end now! Didn't realise.

Zov · 30/08/2026 18:23

Totaldramallama · 29/08/2026 22:58

Of course it is incest. They are related. And if you read this thread you will seen the main concern is intergenerational cousin marriage leads to genetic issues and disabilities. How can you possible argue that it's fine?

I do agree with you. (That it's incest..) It is legal though - inexplicably. It needs to be made illegal though, for sure. Never mind if it's '2 consenting adults' (as a previous poster said,) first cousins getting married and having children?! No. Just NO.

It IS a very close kin, and it has been proven that health issues in the children of two cousins, are far more likely than that of the children of a couple whose parents aren't brother and sister!

!

Gwenhwyfar · 30/08/2026 18:18

nomas · 30/08/2026 15:22

My comment was more about those who keep talking about the monetary cost, as if other things don’t carry questionable costs too.

The number of cousin marriages is rapidly falling and I think that’s positive.

The monetary cost is not the important thing, but that's the only language some people understand.

Gwenhwyfar · 30/08/2026 18:17

nomas · 30/08/2026 15:55

What benefits do second wives get? Maybe I’ll sign up.

Me too!

Gwenhwyfar · 30/08/2026 18:16

Bu2014 · 30/08/2026 15:47

First cousin marriage is predominant amongst Islamic communities not Asians! There is a difference between the two

Evidence for that? I don't think the culture is the same in every Muslim country. I expect it concerns certain communities in particular.

nomas · 30/08/2026 15:55

climbintheback · 30/08/2026 15:54

Whatever - ban cousin marriage,
ban 2nd wives and their benefits,
ban sharia,
ban benefits for non British, ban free health care for non British, ban sub letting council houses and on and on - let’s have a referendum just stop the pull for a start!

What benefits do second wives get? Maybe I’ll sign up.

climbintheback · 30/08/2026 15:54

Whatever - ban cousin marriage,
ban 2nd wives and their benefits,
ban sharia,
ban benefits for non British, ban free health care for non British, ban sub letting council houses and on and on - let’s have a referendum just stop the pull for a start!

Bu2014 · 30/08/2026 15:47

First cousin marriage is predominant amongst Islamic communities not Asians! There is a difference between the two

LauraNicolaides · 30/08/2026 15:35

Gwenhwyfar · 30/08/2026 14:59

Yes, but the point many people are making is that if cousin marriage is repeated over many generations, the risks increase.

Yes, sorry, should have quoted the post I was replying to (yours!) which was drawing a parallel between accepting sibling marriages and accepting first-cousin marriages. There's very good reason to treat them differently.

Scarlettpixie · 30/08/2026 15:33

My grandparents were first cousins so I can't get worked up about it. If it's a one off, I don't think genetic issues are much of a concern whereas if it happens more frequently in a family it becomes more risky.

nomas · 30/08/2026 15:22

Gwenhwyfar · 30/08/2026 14:58

It's not just about the cost to the NHS. It's about the cost to the children and their descendants and society.

My comment was more about those who keep talking about the monetary cost, as if other things don’t carry questionable costs too.

The number of cousin marriages is rapidly falling and I think that’s positive.

x2boys · 30/08/2026 15:03

LauraNicolaides · 30/08/2026 14:57

For full siblings there is a high risk of genetic abnormalities in any child. For first cousins the risk is very much lower, and not hugely concerning.

In medical genetics, the elevated risk for isolated first cousin parents is an extra 1.7% to 3% which is considered comparable to the increased genetic risk seen in pregnancies where the mother is over the age of 40.

For full siblings, the risk jumps to 20% to 50%, alongside significantly elevated infant mortality.

Yes most prople know that
Its the repeated generation after generation of first cousin marriage in one family thats an issue
As the risk increases massivley .

Gwenhwyfar · 30/08/2026 14:59

LauraNicolaides · 30/08/2026 14:57

For full siblings there is a high risk of genetic abnormalities in any child. For first cousins the risk is very much lower, and not hugely concerning.

In medical genetics, the elevated risk for isolated first cousin parents is an extra 1.7% to 3% which is considered comparable to the increased genetic risk seen in pregnancies where the mother is over the age of 40.

For full siblings, the risk jumps to 20% to 50%, alongside significantly elevated infant mortality.

Yes, but the point many people are making is that if cousin marriage is repeated over many generations, the risks increase.

Gwenhwyfar · 30/08/2026 14:58

nomas · 30/08/2026 14:55

In that case people who don’t drink could object to their taxes paying for people who drink alcohol and get alcohol related diseases, and those that get into accidents due to alcohol misuse. The cost of that to the NHS is £5 billion per annum.

It's not just about the cost to the NHS. It's about the cost to the children and their descendants and society.

LauraNicolaides · 30/08/2026 14:57

For full siblings there is a high risk of genetic abnormalities in any child. For first cousins the risk is very much lower, and not hugely concerning.

In medical genetics, the elevated risk for isolated first cousin parents is an extra 1.7% to 3% which is considered comparable to the increased genetic risk seen in pregnancies where the mother is over the age of 40.

For full siblings, the risk jumps to 20% to 50%, alongside significantly elevated infant mortality.

Gwenhwyfar · 30/08/2026 14:57

nomas · 30/08/2026 14:53

The legal definition has been the same for hundreds of years in the UK.

But it might change soon, which is the whole point of the discussion.

Also, I suppose there are different laws for sexual relations and marriage, because the law you posted didn't include step-parents or uncle/aunts and nieces/nephews, which I also thought were not allowed.

nomas · 30/08/2026 14:55

Laurmolonlabe · 27/08/2026 12:17

Not adviseable if you intent to have children. I think the government has every right to ban it because of the cost to the NHS and social services.

In that case people who don’t drink could object to their taxes paying for people who drink alcohol and get alcohol related diseases, and those that get into accidents due to alcohol misuse. The cost of that to the NHS is £5 billion per annum.

nomas · 30/08/2026 14:53

Gwenhwyfar · 30/08/2026 14:42

"Because the dictionary assumes you would know the law."

No, because the legal definition varies by time and place.

The legal definition has been the same for hundreds of years in the UK.

Gwenhwyfar · 30/08/2026 14:44

HungryAllTheTimeeeee · 30/08/2026 13:35

Who are we to ban a relationship between 2 consenting adults. If they want to be together, they will. Might as well let them marry. Doesn't affect my life

So the same for brother and sister???

Gwenhwyfar · 30/08/2026 14:44

81Claire81 · 30/08/2026 13:55

Yeah really strange they didn't feel the ick about shagging their cousin.

I don't feel an ick either, I just don't think it's a good idea.
It might depend on how close you are to your cousin. If you grew up playing together it might feel different to being more distant.

Gwenhwyfar · 30/08/2026 14:42

"Because the dictionary assumes you would know the law."

No, because the legal definition varies by time and place.

5MinuteArgument · 30/08/2026 14:38

SnowFrogJelly · 29/08/2026 23:13

I’m just sick of ignorant posters saying it is disgusting

Personally I don't have a problem with it if it's just the occasional couple who get married as first cousins. I'm not very close to my cousins and didn't see them much growing up.

The problem lies with communities who practice this as a norm, generation after generation. Disabled children. Cost to the taxpayer. Women unable to escape marital abuse. Less integration. Clan based structures.

5MinuteArgument · 30/08/2026 14:25

ohdelay · 30/08/2026 11:41

Sleeping with your cousin is a short step to sleeping with your brother or sister. They probably look alike and it is disgusting. The lack of ick on that is a you problem. Humans have evolved to be disgusted by sleeping with family, it is depressing that so many of this thread are losing this natural protection.

But there are communities for whom marrying a cousin, far from being seen as 'icky', is a cultural norm.

For me, that's the problem. If we have communities in the UK who practice this generation after generation, then we have children being severely disabled and the taxpayer being burdened.

Personally I'm not worried about the occasional couple getting married who are cousins, but when its practiced as a cultural norm, it's a problem.

ToWhitToWhoo · 30/08/2026 14:22

ohdelay · 30/08/2026 11:41

Sleeping with your cousin is a short step to sleeping with your brother or sister. They probably look alike and it is disgusting. The lack of ick on that is a you problem. Humans have evolved to be disgusted by sleeping with family, it is depressing that so many of this thread are losing this natural protection.

If they look alike, it's likely because of previous inbreeding, in which case it is indeed highly undesirable to continue it. But not all cousins look similar at all.

Humans have evolved not to interbreed with people with whom they've grown up, which usually does mean close relatives; but, for example, I understand that children who've grown up together in Israeli kibbutzim rarely fancy each other, despite being biologically unrelated.

Cousin marriage has been common in many societies, while sibling marriage has almost always been banned.

Don't get me wrong- I'm not a fan of first cousin marriage, but it's not equivalent to, or a gateway to, reproducing with your sibling!

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