*I didnt experience that because I doubt it would be so good most of the times, but I totally felt like that with someone I just met... that i could have sex with them and it can be deep.
Nothing comparing to "real depth" of intimate relationships, of course... but still.. it can be some kind of exploration of yourself, life, passions... just like love.
Except what i just described could easily turn into something more.... or it could be just one night /few days.. because you know you arent right for each other for some reasons...
kind of like in .... Before Sunrise.... it was casual, they (almost) never saw each other again...but you cant say it wasnt meaningful.
Or like in the movie... Lost in Translation, they didnt have sex.. but their connection was deep, and they know it doesnt have future.. their thing was passing and casual but deep.