What's the difference between sex and gender?
You can't have gender with your sister.
What's the difference between sex and gender?
You can't have gender with your sister.
Listen up, buttercup! This joke is all about the play on words, see? It's kinda crude. Like, "sex" refers to the biological act, while "gender" refers to how you identify. But the joke twists it to say you can't have "gender" (as in, like, fun times) with your sister. It's supposed to be a shock, but honestly, it's just kinda dumb. And judging by your face, it flew right over your head, didn't it?