Tampons

From my email:

When they were young lads, Brian and Greg walked into a pharmacy one day, picked out a box of tampons and proceeded to the checkout counter. 

The pharmacist at the counter asked Brian, “Son, how old are you?” 

“Eight”, Brian replied. 

The man continued, “Do you know what these are used for?” 

Brian replied, “Not exactly, but they aren't for me. They're for Greg. He's my best friend. He’s four."

"Oh, really?" the pharmacist replied with a grin. 

"Yes." Brian said. "We saw on TV that if you use these, you would be able to swim, play tennis and ride a bike. Right now, he can't do none of that.”