Right. I’m not going to talk about strap-ons in front of your six year old, but “Maisie in math class has two moms” is easy enough, as is “Some women like to marry other women” or “We thought Toni was a boy, but she’s actually a girl.”

Not hard at all, and if you decide to be a parent you sign yourself up for learning how to explain all kinds of things in age-appropriate manner.