Butter vs Crisco

Bubba is showering in a locker room with his buddy
when he notices his friend is very well endowed.
"Damn, Bob, you're really hung!"
Bob exclaims. "I wasn't always this impressive; I had to work for it."
What do you mean?" Bubba asked.
"Well, everyday for the past 2 years, I've spent an
hour each night rubbing it with butter. I know it
sounds crazy, but it actually made it grow 4 inches!
You should try it."
Bubba agrees, and the two say good-bye.

A few months later, the two are in the same locker
room, and Bob asks Bubba how his situation was
developing. Bubba replied, "I did what you said, Bob,
but I've actually gotten smaller! I lost 2 inches already!"

"Did you do everything I told you? An hour each day with butter?"
"Well, we don't usually have real butter, so I've been using Crisco."

"Crisco!" Bob exclaimed. "Dammit, Bubba, Crisco is shortening!"