It is commonly known that heat is not good for a gentleman's sperm. An article in the newspaper explored underwear (Briefs vs. Boxer Shorts). It is not much of a stretch to realize that those of us who feel the heat from their ST on 'the boys' might be cooking the little ones. Moral of this story is ventilate! Stand up now and then, slide back away from the tank a bit, open your knees to bring cooling air in.