I've used it in my biceps, back in the day... it's bad associated shit for stretching the fascia... you can literally watch your biceps grow over an inch, closer to 2 inches, within less than five minutes.... but, it does cause severe pain!! I couldn't even imagine injecting that in my dick, even though that is what it is actually used for, medically.... I would venture to guess you would have a huge, extremely painful erection that hurts toomf'ing bad to luck your chick!