That gives some background. I was just curious as to what the rules of it are from a woman's standpoint. In other words, if a woman allows a guy to play it, what rules and etiquette should the guy follow in playing? From the sound of it, it seems like the woman controls the whole situation, otherwise it wouldnt be "just the tip." Is there a time limit on how long hes allowed to stay in? Is climax allowed for the guy? What are some of the other reasons women have done it besides the mistken contraception thing?