I wouldn't do that. Whatever health benefits you get from not showering have to be weighted against the health problems caused by you banging your head against the wall after that nice girl/guy actually talks to you and you don't even remember what you said because you can see they know that's not wax on your hair.
No, pointing out the health benefits of not showering won't help. Don't mention damp cloths http://www.youtube.com/watch?v=jSJQEl5vcAo
No, thinking that you are not playing the seduction game for whatever reason is not a valid excuse, it's just not playing to win by handicapping yourself. That's not very rational :|
Here's some actual advice related to personal hygiene and appearance in general:
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.