Thankfully, much of modern medicine is devoted to keeping penises erect.

If the detail of the hard facts is of no interest to you, skip the following paragraph.

If you want to impress your science teacher, you should know that Sta-Hard is a desensitizing cream containing benzocaine. Benzocaine is an analgesic used in many over the counter drugs. When nerve endings are stimulated, an electrical signal travels to the brain, where it is then interpreted as either the sudden sharp pain of a misguided zipper, or the exquisite pleasure of a hot lover's hand, tongue or orifice. (This is why the brain is one of my favorite organs.) The benzocaine in Sta-Hard buffers that signal.

If you want to impress your lover, you can forget all that. Just remember to apply Sta-Hard Desensitizing Cream whenever you want something to stay hard ...that is, a penis, not a detailed science explanation. We recommend that your partner do the applying. It's always more fun when someone else does the hard work. The benzocaine will reduce sensation, and can therefore delay ejaculation. And since Sta-Hard is cherry flavored, you can reward your hard working partner with plenty of hard candy.