Here are 12; check the article at Reader's Digest online for all 31. The copy is theirs but I touched it up a bit.Your mom probably never told you this, but it's true: Sex is good for you! (Nope, Mom forgot to mention it.) Plenty of studies show it: Regular sex increases immunity from viruses, relieves stress, and even helps protect the health of a man's prostate gland by emptying fluids held