Unproblematic Prostitution: Played absolutely straight in the Empire for all seven of the listed common elements – and mostly straight in those offworld locations the Eldinimieuthunimis is operating in the negotiable affection business and enforcing their cultural prejudices with a will – but it is to be noted that this is very much a product of local cultural prejudices, including but not limited to the lack of our wacky hangups about sex in either direction, intense respect for the perquisites of one’s fellow sophs, that pure/direct sex sales represent a small market segment (see: Platonic Prostitution), great respect for professionalism (see: High Class Call Girl), and the local nonexistence of our creepy primate dominance kink.

Elsewhere, your mileage varies greatly, from places that are prepared to be just as self-consciously civilized about it, to places where it is as problematic as it is on Earth (including the really unpleasant bits, like drug addiction as a control technique and sophont trafficking), to places where it is considerably more problematic.  As ever, the Cultural Clash abounds.