See, from what I understand, that example wouldn't break the rules because it isn't direct and doesn't use overtly sexualized language. Just because something describes a sexual act does not mean it is automatically going to be picked up by Adsense.

When it comes to shit like that, you got to assume that it has to be dirty in a way a bot can pick up on. If you can't see how a bot can figure it out, it isn't going to get you in trouble.