Logic at the Community College

Looking for a little knowledge, Jimmy walks into his local community college and asks the admissions clerk on duty what classes are being offered. The clerk tells Jimmy there is a logic course starting up soon.
"Logic?" Asks Jimmy, "what's that?"
"Logic is real easy, let me explain it this way, Jimmy do you own a lawnmower?"
"Why yes I do"
"Ok, that must mean you've got a yard"
"Yup"
"If you've got a yard, then you must have a house"
"Sure do"
"And if you've got a house, you probably have kids"
"Three of them!"
"Wow, then you must be a heterosexual male with a beautiful wife at home"
"Yes, yes! This logic thing is pretty cool, sign me up!"
Later that day Jimmy goes home and sees his neighbor Gary and tells Gary about his new college course. Gary says "logic? What's that?"
"Well let me explain it like this", says Jimmy. "Do you own a lawnmower Gary?"
"No, I always borrow yours"
"Well then you must be a homosexual!"