I don't tell men what my deal breakers are.

And it works.

My most recent sex partner was nice to my face after sex - probably because I specifically told him before we had sex that men getting weird with me after is why I'm celibate.

So, instead, I found out he was telling all his friends I'm a "fat whore." Dude is not in my league, and was lucky I liked him (I thought), so when he asked for a second round, i said no.

I didn't say why.

Turned down a dude right after him about ten times, and don't regret it. Turns out, he's a pedo, and one of the reasons he wanted to have sex with me is because a BUNCH of dudes in his circle lied about sleeping with me, and he told me to my face that I give it to everyone, so why not him?

Had I said I don't sleep with men much because of gossip, he'd have lied to me about that last part.

Don't tell them your deal breakers, but have those ultimatums, and don't feel bad. You wouldn't sleep with a bad person if you knew they were bad, so don't tell them HOW to lie to you about how they are.