I've always had an issue with my then bf J (now ex bf but we've talk about getting back) and it's regarding kids. Usually it's mainly heard about how the woman always wants it while the man doesn't but in my case it's the opposite.
From the beginning when he met me (I was 19 then and he was 21), I was clear with him on not ever wanting kids and he answered with an ''It's ok if you don't want them, then I don't either''. It was basically whatever I decided but as the time went by, he said he did want kids in the future, how he always wanted a child and how one day it'll kick in for me. I remembered I told him once how I suddenly wanted kids but it was only just to make him feel better.
I'm now 26 years old (will be 27 on April) and it hasn't kick in; my biological clock will never tick. I still have no desire for kids. I would be happy with just a childless marriage in the future.