Ha! most of us know these ones but there are one or two good ones I hadn't thought about before... (http://www.syncmag.com/article2/0,1895,1882951,00.asp)
Not new but still funny.
"It burns when I pee"
http://www.syncmag.com/article2/0,1895,1882951,00.asp Nothing to joke about, if anyone in the office "sows their oats" a lot ;) :P :o