Sex can feel very, very nice.

If you do it one particular way, with a particular kind of person, during particular days of your or your partner’s menstrual cycle, assuming you or your partner are old enough but not too old to ovulate or inseminate then, yeah, you can also reproduce.

Oh, unless by “sex” you mean only “penis-in-vagina intercourse to male ejaculation between ages 15 and 25, or as long as both of you are still ‘hawtt’ enough that someone else would want to watch.” If you mean that then yeah, you get a lot of reproduction that way.

But that’s a pretty limited definition of sex.

An extravagantly limited definition.

That doesn’t mean a lot of people don’t enjoy PIV intercourse, or even that they shouldn’t. It just means it’s a bit of a framing trap to assume it’s about, or even mostly about reproduction.