Aw Ren- don't worry. Those sorts of comments are more 'fluff talk" than serious. You know like " so when are you having another one?" whilst you are still in the maternity ward.

Have a look around yourself. Look at all the types of roles your son will be exposed to while he is so young. He will see mummies that work, mummies that stay at home, daddies that change nappies, partners with differing skin colours, women in politics and heads of corporations, and men that hold hands like his mum and dad.
If and when he sees this stuff it becomes the norm, not unusual. Imagine if right now was the 1950's???? Strict gender roles and sexuality rules, no choice at all.

I heartily agree with recognizing and celebrating the differences with gender - kids have more interesting things to do than care about the colour tshirt they are wearing!