....Oh, one more thing, I was never tired at 40!
Well I'm not embarressed to admit that I'm very tired. I've been raising kids for the last 16 years and it's taken alot out of me. No way would I want to take on another child now much less in 20 years.
It's very selfish to convince yourself your still as good as you used to be when it comes to the welfare of a baby.
Your friends may be coping with raising a child in their 60's but I'd guess the child is not getting all the time attention and care it would from younger parents.
It's a fact of life and probably the reason we women start losing our ability to have babies from our 40s on up.