When your sex partner, that normally doesn't partake in sexual "dirty talk" (they may even normally find it degrading and disgusting), begins emitting nasty words without control. It’s almost as if they have gotten a temporary case of Tourette’s syndrome. It’s just that it all feels so damn good that’s all they can say. Hey, we’ve all been there!
Hey Jim, I musta really had my mojo workin' last night. My normally cadaverous librarian girlfriend had a case of the sextourettes while we was doin' it. I didn't even know she knew some of those words! Damn, I'm still trying to figure out what I did so I can do it again. So's she!