system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that, in English, there is not a transitive verb for 'have sex' except ones with vulgar connotations?

This question came up among friends earlier- why is the non-crude vocabulary for sex limited to indirect euphemisms (made love, slept with, etc.) Is it a holdover from more prudish times? All of the options I can think of (he *fucked* her, *did*, *screwed*, *boned*, *nailed*, etc) seem to suggest that the direct-object participant is passive and being demeaned. Does any word for the act just naturally pick up this kind of meaning? Is it common in other languages? It seems plausible that a neutral word would be used derogatorily and come to pick up that kind of connotation.
gpt
Transitive? Because having sex is not something you make TO another person, but WITH another person. There's not subject and object, but two subjects. 

The vulgar ones are transitive because they consider one of the persons to be an object, not a subject.