The blonde and the crocodile.

Steve Irwin walks into a bar with his pet crocodile by his side. He puts
the croc up on the bar. He then turns to the astonished patrons and says: "I'll make you a deal. I'll open this croc's mouth and place my genitalia inside.
Then the croc will close his mouth for one minute. Then he'll open his
mouth and I'll remove my genitalia unscathed. In return for witnessing this
spectacle, each of you will buy me a drink."

The crowd murmured in unanimous approval. Steve stood up on the bar,
dropped his trousers, and placed his privates in the crocodile's open mouth. The croc closed his mouth as the crowd gasped. After a minute, Irwin grabbed a beer bottle and smacked the croc hard on the top of its head.

The croc opened his mouth and he removed his genitals unscathed as
promised.

The crowd cheered and the first of his free drinks were delivered. Steve
stood up again and made another offer. "I'll pay anyone $100 who's willing to give it a try."

A hush fell over the crowd. After a while, a hand went up in the back of
the bar.

A blonde woman timidly spoke up...

"I'll try it! Just don't hit me so hard with the beer bottle."