To the majority of the individuals, this is probably what we think. But in terms of man kind's interest, no.
Personally, I find love and sex has a link. (although I don't think I've yet to truly experience either) If you love someone, you'd want to have sex with him/her. If you want to have sex with him/her, you're kind of in 'love' with that person in a way.
This is only my personal feelings, and I KNOW there's people out there who isn't like me, and I just don't understand how can someone possibly have casual sex or on night stand (especially girls)