One day, a guy comes into a doctor's office and says, "Doc, I want it to grow."
So the doc says, "Here, take three of these a day," and gives the guy a bottle of pills.
An hour later, another guy comes in and he wants it to grow too. The doc says, "Take 3 of these a day."
"No, I'll take 6!" and the guy leaves.
Then a cowboy comes in: He wants the same. He's told to take 3 but says, "Nah, I'll take 24!" and leaves.
The next day all three guys come into the office.
1st: "Doc, Doc, it's down to my ankles!"
2nd: "Doc, Doc, it's draggin an inch behind me!"
Cowboy: "Yeeee-Haaah!"