Just shove it in her mouth, you'll be alright. Probably.
A great man once said
[after Tammy performs fellatio on Kenny, he contracts syphilis and dies]
Cartman: I told him. The woman's mouth is the most germ-ridden place on earth, I said. Statistically the most unsafe place for a man to put his penis, I said.
Kyle: Well, now we know.
Cartman: And knowing is half the battle.