Aikouka
Lifer
it's not what disgusts you, it's what might influence your kids into behavior you don't want
Then how about you try a real attempt at parenting for once, dagnabbit! Sit the little rapscallions down, and talk to them about things such as sex and nudity. I should hope that if your parenting is good enough and you've raised responsible children that they should typically make good choices.
(I threw in "typically" because no one's perfect. 😛)