fair play liking to ahve sex lots, i like it too but i really cnat keep up wiht my girlfriend, we were frinds for like 4 years before we started going out so we have got some catching up to do but sometime i feel i really cant keep up, we dont go out as much as we used to or anything, jmust have sex and sex, i cant keep up at the rate. Is there any side affect of taking viagra even though you dont need it? Just to maintain an erection after you come once or twice?