Actually, genetics plays a huge role in cholestrol and the bad effects of it. As far as a vegetarian diet goes, it SOUNDS good; BUT many vegetables contain substances (I think they're called isoflavones) that imitate estrogen in the human body. Those effects are definitely deleterious to male sexuality...
Besides, as long as I can chew a steak, I shall always be a member of PETA (People Eating Tasty Animals).