It's not so much the act itself. It's the fact that a lot of us guys here can't even get a girlfriend (and vice-versa for femals as well). Sex would mean we've done something that seems so unattainable because of our SA. It would mean we have overcome a huge barrier, where we have someone we trust enough to share that with, and most importantly somebody else that trusts us.
(I'm talking relationships here though, I'm not thinking escorts and whatnot)
How much wood could a woodchuck chuck if a woodchuck could handle going outside without panicking?