I am currently having a casual 'f**k buddy' relationship with a guy i know. It's odd because he's an ex of mine (though we have both had relationships since each other) and we lost our virginity to one another when i was 16 and he was 17. I don't view myself as behaving like a slag because i know him well, we used to go out, we're being careful and it's a planned thing with only one person, it's not like i'm sleeping around. It's the sort of relationship that is working well for us both, he has a high sex drive, as do i and i currently i trying to focus more on getting into uni than anything else and so don't have the time to invest into a proper boyfriend. I view these sorts of relationships as a good idea, so long as you are both aware of the terms of the agreement and don't get jealous when they see other people. Sometimes these relationships develop into exclusive boyfriend/girlfriend relationship, think of it like dating but getting the awkward 'first time' well and truly out of the way.