Which is why people who enjoy one-night stands often have multiple one-night stands. "What" feels good may be different for different people; I'm sure some enjoy the sex, some the anonymity, some closeness to another they don't have to sustain, some might have an "addiction" and enjoy the release of tension; there's probably a zillion "reasons".

Some people might enjoy multiple one-night stands, others may have had a fantasy that did not play out well and so be leery of that sort of relationship in the future; some might have been "bored" and just went along with the flow rather than think about it at all. Some might have met someone and they both enjoyed the evening enough to try to sustain it, not be just "one-night".