Nature appears to be on the side of males. Although the issue is still largely unresolved, traditional thought has it that a man’s body is less likely to be invaded by marauding bacteria than a woman’s. That’s because a woman’s vagina is dark, warm and moist—conditions under which bacteria thrive. Can’t say that about a penis. Plus, urination helps flush out whatever gets inside a man’s member.
On the flip side, men claim to have far more sexual partners over time than women, putting them at greater risk of exposure. While no one can...
