Two old blokes were having a natter. One sez, "You know, my biggest regret is that I never had a proper education, so I'm going to sign up at the local college."

So off he goes, and the dean says to him that he can sign up for English, maths, history and logic.

"Logic?" Sez he, "What's that??"

"Well let me give you an example. Have you got a weed wand?"

"Well yes..."

"Well I conclude from that that you have a garden."

"Well yes I do!"

"And from that, I conclude that you have a house."

"That's true!"

"And from that I conclude that you have a family."

"Wow, right again!"

"So you have a wife..."

"Absolutely - right again!"

"So you must be heterosexual."

"Gosh, right again!"

He goes back to his friend and tells him that he's signed up for English, Maths, history and logic.

"Logic?" Sez his friend, "What's that?"

"Well, I'll give you an example, right? Have you got a weed wand?"

"Er, no..."

"Jaysus, you queer!"