That's the joke. It's parodying the countless jokes like that that straight cis people make, and saying that you would be so offended if queer people made stuff like this.
I mean, doesn’t this imply gender is a determining factor in your ability to get along with people—and more than that, your ability to function as a person?
It should be two things that work well with others of the same type, but not different. Otherwise you're also saying that male homosexual marriage works, but not female (or vice-versa).
Isn’t it more of a key and lock situation? I know from a spider expert that there is a whole universe of female spider sexual organ studies because of their exoskeleton. Essentially every species has their own „lock“.