Actually there are a number of herbal things that really work. Bodybuilders and powerlifters often take a herb called tribulas terrestris because it stimulates the body to make more testosterone increaseing strength but....anyone who's ever taken it will tell you that not only does it increase performance in the gym but in the bed also. As an amature bodybuilder I can tell you that tribulas = WOOD! A really potent brand to buy? Try Vitrix
I've heard radio ads that mention 12 watermelons have the same effect as one viagra. Luckily, some enterprising soul has captured all of that in tablets that you can buy. I have no idea if they really work. But it sure beats the hell out of eating 12 watermelons 30 minutes before a date!