Alligator

Feeling horrible, an alligator goes to the veterinarian. "What seems to be the problem?" the vet asks.

"I just don't have the drive I used to, Doc," the gator says. "Used to be, I could swim underwater for miles and catch any animal I wanted. Now all I can do is let them swim by."

Concerned, the vet gives him a through examination and hands him a few pills. "What are these?" the gator asks.

"It's a pill very similar to Viagra," the vet answers.

"Hold on, I don't have that kind of problem." The alligator protests. "What exactly is wrong with me?"

"Well." The vet says, "you have a reptile dysfunction."