Your erection depends on factors like your age, and the amount of stomach fat you have. The key thing for it to work, is to do it on an empty stomach, no food for 4 hours before punt, give it plenty of time to kick in, an hour is fine, if it gives you a bionic hard-on you probably shouldn't be on it, if it make you hard enough to penetrate the girl and not lose your hard-on, it is the magic pill. I repeat key factors are empty stomach, and give it time to kick in.