I live in an area where "same gender" relationships are totally normal.
But ... you see very, very few with children. Hardly any, in fact.
It's just accepted that, in choosing a same gender lifestyle, you have a lifestyle which, biologically, is inconsistent with the conventional nuclear family.
(this is not an invitation to start a "choice/genetics" debate)
A lot of people would love to have children (eg me!) but things just work out in a way that children don't quite fit in.
Just because you WANT children, and LOVE children, doesn't automatically mean that you should HAVE children. It's not like getting a new car!