I went down the route of age appropriate but clear honesty.
Seems to have worked ok dd is now 21 and at uni and seems to be a sensible well adjusted sort generally speaking.
As a Csa survivor I taught her at an earlier age than I noticed most parents then did about bodily autonomy, and then sex and conception etc. that seems to be gradually changing thankfully. My mother wasn't impressed with that one but then she is not someone I consider in a position to comment!
We had pets and of course at a certain point they died. I did not shield her from that reality, we had little "funerals" and grieved their loss, when she later lost people close to her she coped better than she would have without that experience I think.
We've watched one born every minute and similar together (again at age appropriate times) and she also experienced becoming a cousin at a time when she was aware enough to ask about pregnancy, childbirth, breastfeeding etc and those questions were answered honestly and openly
She had one cousin who when my gran died was told gran had "gone to sleep" the parents then had to deal with the child being terrified to go to sleep! Stupid!
She also watched news programmes and current affairs shows and read newspapers when primary age - which I noticed other parents didn't allow - and we discussed current affairs.
What I noticed was the kids that weren't allowed to do such things and therefore didn't feel able to ask their parents questions then would worry about stuff that honest and open discussion would have allayed their fears.
I also come from a family full of addicts and other mental illness inc myself from dd was a young age so that was all discussed honestly
I remember her asking "why do people take drugs when they're so bad for you?" And I replied - because at least at first they make you feel nice and that makes people think they're not so bad.
She also asked about my parents smoking and we discussed legal drugs, abuse of prescription meds etc at various points.
She knew about my mental illness and how it affects me and why meds are necessary etc
I also have friends and family who have various disabilities physical and learning disabilities and I have a disability myself as does dd so we've discussed all that too.
I think DS can know that mummy bleeds monthly and it doesn't hurt her or anyone else from a very early age
I hope your not doing this! It's untrue! Many women and girls DO experience period pain, most in fact. Please don't lie about this. He needs to understand the difficulties women and girls deal with at this time.
I don’t see why young children need to know about sex tbh, I just don’t see why they need to know about that?
Children that aren't taught about this area - in age appropriate ways - are more at risk of abuse
They certainly need to be taught to love and respect their and others bodies and bodily autonomy, consent and protecting themselves.
It's best they learn about life, death, sex, etc. from me than from the wrong people or having no knowledge whatsoever.
Totally agree
When I was in last year of school there were 5 got pregnant, at this time parents could still withdraw their dc from having sex ed - all of these were kids where their parents had withdrawn them and their parents hadn't told them either. 2 were pregnant by much older men and it wasn't even treated like the abuse it was! The girls were blamed in every case by parents and the school! And this was a normal comp!
And yes once kids can read and talk to other kids with older brothers and sisters, they start learning a lot more anyway.
Exactly! And they hear a load of crap then!
I was once "told off" by a teacher (not dds actual teacher thankfully) for the fact that dd had corrected some playground gossip of the "you can't get pregnant if you do it standing up" variety. I was told my almost 11 year old shouldn't have known the CORRECT info - never mind another child was spreading misinformation told to her by her older brother!
I worry how they will ever have any resilience at all.
In my experience observing dds peers a lot of them don't!
They are mollycoddled throughout childhood in some cases right up until they leave school at 18 and then when they start applying for uni and jobs and are rejected or worse they're sacked or told off by someone other than a parent or teacher doing so very gently they can't cope!
Not all parents know what's best, not all parents act in ways that are best for their dc my abuser was my father, he was also very anti me knowing certain things about sex or relationships! My mum forced this. He barred me from dating until I was 16 (I dated secretly instead and probably chose not the best lads as I think I was more vulnerable to less savoury types as a result)
@showmethegin that's a lovely explanation of mc. I've had 2 myself which dd has known about from a fairly young age, first time it came up was because a friend of the family she was close to sadly had a late mc.
@dottydodah because not every child has an idyllic childhood, because part of parenting is preparing them to be resilient and determined and able to handle life.
Also how can you possibly protect your own children if you don't understand the dangers in life yourself?
Excellent point
@Wreath21 the whole religion thing very tricky in my family/extended family! I was raised catholic but am now lapsed (you're never an ex catholic just a bad one! ) but we have relatives who are Protestant, Jewish, Muslim, atheist and Sikh - so there's a lot of different rites of passage, practices and diets based on religion too. Big family (mum one of 6 dad one of 5 don't even get me started on the grandparents!)
We all attend as invited (sometimes weddings are small, but baby naming and death rituals tend to be whole family) so there's a lot of discussion of the different ways of marking them.
Even when we all get together for things like birthdays it tend to be a "pot luck" type deal (cos frankly nobody can afford to feed the whole clan!) but we as a family have developed over the years ways of labelling/identifying which foods are kosher etc on the buffet table and then me and a few cousins complicate matters with vegetarianism plus there's allergies...it's certainly interesting! 
At this point we try and stick to dishes that cover several requirements!
@JassyRadlett I had a similar experience with my ex, he was army and was encouraged by his bosses to be clear with me as his wife as to what he wanted to happen in the event of his death. It was like getting blood out of a stone! He wouldn't even make a will until after we had dd and he was due to go on deployment when she was 3 months old at which point I was getting very frustrated with him! He did make one but he hated the whole process.
I do remember my dd falling about laughing thinking I was winding her up when I told her (after her asking) exactly how the daddy's seed gets in mummy's belly she was 7/8 at the time. Then when she realised I wasn't kidding she went like "then I am NOT having babies! No way I'm doing THAT!" 
I had "but is it like an apple seed and if it grows too big it'll turn into a tree and kill you?" That was thanks to my mum telling her not to eat apple cores! 