I'm not sure how widespread this is, but I've encountered attitudes about sex I find weird.
Like I was hanging out with this one girl and we were gonna have sex, but she was worried about feelings and I told her that wasn't an issue with me, and she was like, "yeah, some people just don't see it that way. We're just helping each other out."
That isn't the first time I heard that phrase. But that's something I'd say when my neighbor mows part of my lawn that I missed and I do the same for them.
I don't think of sex as a favor any more than someone playing me music. It's not meant to fix some kind of deficit, but something I do because I like it. Horniness isn't like an unmowed lawn.
Do some people see their own sexuality as some kind of self-imposed tax? Sex is a form of connection like conversation, and I've never heard someone refer to conversation that way.
Second, when people say "he/she is big/small" or whatever referring to their genitals. We don't say that about any other part of our bodies. I've heard people from Asia and the Midwest say the same kind of thing. The first time a girl asked me "how big are you?" my knee jerk reaction was like, "uhhh, that sounds weird. Is this ordinary English? Am I my penis?"