Sex By Proxy: The slinky (i.e., recorded full-sensory and emotional data) erotica market.  Also, possible by techlepathy (see: Psychic Powers) if you have the consent of the people you’d be eavesdropping on.

Also, in a more friendship/romance-oriented way than strictly sexual, a consequence of the metamind feedback system mentioned in Touched By Vorlons, and, relevantly, Angel Unaware.  If a lot of people like you (or one person’s liking, or indeed love, is particularly intense), this feeds back into the metamind’s opinion of you, which in turn feeds back into individual’s opinions of you… which then leads to people liking, or at the very least being predisposed to like, you even if they’ve never actually met you personally. As A Miracle of Science puts it, “Brazil has decided you’re cute.“