Well maybe not "sexual" closeness but some closeness. As I've said on this site many times, I have male friends at my college who I've slept with, as in "sleeping in the same bed together", not having genital sex with. And we've cuddled and talked and slept. It feels good to be physically close to peeps you care about. You don't have to fuck them. In fact I don't really want to fuck them. I think the whole idea of being straight is not the opposite of being gay or homosexual. If someone wants to experiment, just do and don't get all freaked by it.