Mr. R, despite what people say, it doesn’t really have much of an effect on normal people and no direct effect on the libido whatsoever. This is because Viagra® doesn’t really give an erection as much as preventing you from losing your erection. If you have no problem with keeping your erection, it won’t do much for you. Taking it when you have no problem isn’t that dangerous, but there is a small chance of developing priapism (whether you have ED or not). Priapism is a persistent, abnormal and painful erection that may lead to permanent impotency. Bit of a high price to pay for just fooling around, don’t you think? Good luck.