I'm childfree and the age range where a lot of available appropriate men now have children...am very, very wary and would rather be single.
Even though children can be fun.
Either I'd have to be a completely patient, giving, sacrificing, maternal extroverted type who enjoys a houseful (which I'm definitely not)
Or there'd have to be loads of spare money between us to smooth things over, and maintain affluent separate lives (like Princess Beatrice's husband) which seems unlikely!
I just don't think most of us are designed to feel the same about someone else's children than our own.
Some exceptions, but SOMEONE always ultimately feels hard done by.
We are all super-evolved animals competing for resources under our altruism!
Either step-mum compromises or the children.
Or if problems aren't there at the start, they appear down the line, especially when it comes to things like money and inheritance.
As a midrange child-free woman, most people aren't that socially interested in me and I'm quite invisible.
However, I have often found myself aggressively socially pursued by older men with children.
and they are always always super keen to integrate force me into their lives, and get me involved with their children...
(I expect they think my chromosomes and gender roles mean I'm going to start contributing to their children asap!)