As long as its used to express love at least on the first occasion with a partner I see no problem, but sleeping around surely takes the special~ness of it.
I personally don't see how people go out and just want to have sex with a random stranger, I have nothing against people doing it but its like why bother, a little bit of pleasure whilst running a massive risk.
Sex is an act of love and should only be performed with the one you love whether you be married or not you need to be in love, or it could be your 'first......mistake'