People have *rules* for this shit? Man, like the relationships between men and women aren't complicated enough. I think that people should care about each other before they fuck. It's like in Clerks "If I like someone, I just go down on them. I only sleep with the ones that I love, and I love you, Dante."
So, the moral is, just go down on them
![Stick Out Tongue](/tfp/images/smilies/tongue.gif)