A grad student, a post-doc, and a professor are walking through a city park and they find an antique oil lamp. They rub it and a genie comes out in a puff of smoke.

The genie says, "I usually only grant three wishes, so I'll give each of you just one."

"Me first! Me first!" says the grad student. "I want to be in the Bahamas, driving a speedboat with a gorgeous woman who sunbathes topless." Poof! He's gone.

"Me next! Me next!" says the post-doc. "I want to be in Hawaii, relaxing on the beach with a professional hula dancer on one side and a Mai Tai on the other." Poof! He's gone.

"You're next," the genie says to the professor.

The professor says, "I want those guys back in the lab after lunch."