The following comment has to do more with the "human condition" than a "religious perspective:"
I see the best circumstances for a "healthy," positive, sexual expression best founded in a relationship that is long term and mutually beneficial. Sex is just too complicated to be "beneficail" in any other place. If we are just using sex as a release of built up frustration or lust, it is NOT connected to a removal of lonliness: that was my point. What is missing in the society around us is the interactions that promote the personal contact. Computers and the net are a means of contact, however, we are typing or talking while alone.
Your buds need to get their arses (hillbilly for "buttucks") off the couch and down to the local soup kitchen or Habitat for Humanity project. Get involve with people: frustrating as that is. They need people to form the relationships that will lead them to thier soul mate. Man, just look at the pictures of the women that have been posted on this board: everyone is really beautiful for this or that reason: they just shine. And, from the posts they are really cool. Yet, think of how much "cooler" they would be if you were working beside them in a project or over a cup of coffee with common friends.
This is what your buddies need to see.
I'm done....
V