Well, heck, he got a groan out of you! ;-) Sometimes, for us aspiring humourist wannabes, a groan is a sign of (marginal) success.
I'd disagree with Guy here - I'd say a transister is a guy who wears nun's clothing.
Speaking of nuns' clothing, did you hear the one about the laundry pickup guy who showed up at the nunnery and announced, "I'm here to clean your dirty habits!"
How many white guys does it take to change a light bulb?
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One. (I actually made this joke up, if you can call it a joke.)