Mankind has always had an uneasy truce with Womankind. It starts from birth and carries on forever, wherever men and women coexist. There are definitely “guy” things and “girl” things and never the twain shall meet.
You may remember that I have fraternal twins - a boy and a girl. This is quite different than identical twins, although we still get asked some days if they are identical. My favourite answer is - "No, they aren't identical. They have different plumbing." I still get blank stares with that answer….