Jim turns to Bob and says “You know, I’m tired of going through life without an education. I think I’ll go to the community college, and sign up for some classes.”

Bob thinks that’s a good idea, and the two leave.

The next day, Jim goes down to the college and meets the Dean of Admissions, who signs him up for the four basic classes:  Math,  English,  History, and  Logic.

“Logic”, Jim says, “What’s that?”

The Dean says “I’ll give you an example.  Do you own a weed-eater?”

“Yeah”, says Jim.

Dean says “Then, logically speaking, because you own a weed-eater, I think you would have a yard.”

Jim says, “That’s true, I do have a yard.”

“I’m not done”, says the Dean.  “Because you have a yard, I think, logically, you would have a house.”

Jim says, “Yes, I do have a house.”

The Dean says, “And because you have a house, I think, logically, you  might have a family.”

“Yes”, Jim says.  “I have a family.”

“I’m not done yet”, the Dean says.  “Because you have a family, then, logically, you must have a wife, so logic tells me you must be a heterosexual.”

Jim says “I am a heterosexual.  That’s amazing  -  you were able to  find out all of that because I have a weed-eater!”

Excited to take the class now, Jim shakes the Dean’s hand and leaves  to go meet Bob at the bar.

He tells Bob about the classes he signed up for:  Math,  English, History,  and  Logic.

“Logic”, says Bob.  “What’s that?”

Jim says, “I’ll give you an example.  Do you have a weed-eater?”

Bob says “No.”

Jim says, “Then you’re a queer.”