I have tried PT-141, and it absolutely works as advertised. One to two hours after you take it, you feel like you will die if you do not have sex, and the erections follow. It lasted for me a somehwat uncomfortable six hours–three of which were AFTER I had sex with my wife. It also has some tough sides–a little nausea at first and a head rush, then this weird need to stretch continuously. I haven’t done it since, but it absolutely is desire and erection in a can.