A guy walks into a pharmacy and says to the pharmacist, "Listen, I have three girls coming over tonight. I've never had three girls at once. I need something to keep me ready and keep me potent."
The pharmacist reaches under the counter, unlocks the bottom drawer and takes out a small cardboard box marked with a label **Viagra Extra Strength** and says, "Here, if you eat this, you'll go nuts for twelve hours."
The guy says, "Gimme three boxes."