The pro-condom argument suggests that saliva is better at killing errant bacteria than vaginal juices. Also, because sex organs become engorged with blood, any minor fissure is liable to act as a conduit for those tiny little HIV ants. You know, the little HIV ants that bite.

Of course, if you then spray your AIDS-infected ball juice onto some whore's face and it goes into her eyes or those shaving nicks by her Adam's apple, then all bets are off.