The Jones test
The Jones test it to test whether you should fuck a girl. Before fucking a girl ask yourself "Can i imagine myself ever having kids with this girl?" If the answer is yes, then and ONLY then can you fuck her.
1."Dude, i fucked this crazy girl and i can't get rid of her now"
2."What the hell, did you not do the Jones test on her first?"
2."What the hell, did you not do the Jones test on her first?"