I just have to state my mind on these commercials for Viagra & Cialis. I find it humorous that the man is directed to seek immediate medical attention if the erection last 4 hours or more. I'm sorry, but what about the woman? Cuz you know he's not wasting a good hard on! After 4 hours of screwing, she might need some medical attention herself. Even if you alternate with oral and anal sex, she is going to need some medical attention! JUST SAYING!!