If you can't understand that, then you're in no place to lecture me about supposedly not understanding psychology.
There's nothing in psychology, behaviorology or biology at large which supports this. Social species can and often do have sex even where procreation is impossible, showing that sex has use beyond reproductivity. Just like even though the primary activity for tongues is in food delivery (to teeth or gullet) does not obviate the use for speaking, kissing, et al.
1. Sleeping around isn't healthy.
2. Healthy =/= good.
3. The religious position doesn't have anything to do with whether sex is healthy or not. If God said it was wrong to eat more than 800 calories a day, it would still be wrong, even if it's the healthy thing to do.
-We haven't been discussing 'sleeping around.' I'm in a monogamous relationship with my husband and you said 'don't have sex unless you want kids,' which is just dumb.
But even if we were talking about sleeping around, once again, christian fundamentalist communities have higher rates of sti and unwanted pregnancies. Suggesting the healthy thing to do isn't to keep at this tired old, outdated mode of restriction and accept it isn't working, then switch to something working better.
-Healthy does, in fact, = good
-Authoritarianism is no argument. If you can't argue an activity based on tangible merit, then why bother arguing at all? If there is a God, which I highly doubt, I would hope that it would appreciate the use of the brain it built, rather than blind subservience.