Sometimes sex is just sex.
Not about hearts and flowers but about connecting right there, that minute, with someone with whom you share an attraction. Many of us have been in that scenario, and it can be incredibly fun.
Not every sexual encounter has to be about happily ever after. Sometimes, it can just be about having no-strings-attached fun — you know, casual sex.
That's what hook-up culture is all about! The key, though, is being respectful.