i have done it over a million times with my girl friend she says just once a week and im happy lol the first time we did it was at my cousins house he just got off deversion for haveing a 8th in school and we were drinking and smoking and shyt. well we wanted to stay up and wait up for some of our buddies that wernt comming till late so me and my girl friend wanted to take a shower to stay awake well we went in there and had sex on the floor then went in the shower and i rubbed my dick on her ass and she told me to put it in.(she said it in her sexy voice lol) and we do it all the time now lol.