Farmer Bill and Farmer Joe

Farmer Bill and Farmer Joe were sitting in a bar, drinking and joking around, the conversation soon falls silent.
"Ya know what Joe?" Says Bill "I aint had enough education, tomorrow im going to night school!"
"Good idea Bill," says Joe "Tell me how it goes!"

The next day Bill visits the collage to aplly for night school.
"Good afternoon," says the class registrator "How may I help you?"
"Hiya, I'm here to sign up to night school, can you give me some information on the classes?" Asks Bill
"Certainly, we teach all the core subjects, Math, Science, English and Logic"
"Logic? Whats that all about?" Askes Bill
"It's easier if I give you an example" Explains the registrator "Do you own a leaf blower?" He askes
"As a matter of fact I do!" Answers Bill
"Seeing as you own a leaf blower" the registator continues "I can deduce that you have a yard, and by knowing that I can establish that you have a house, and with that house you must have a family, because you have a family, can figure out that you are married, therefor you must be a heterosexual male!"
"Gosh darn!" Exclames Bill "Thats amazing, you figured out my sexuality because I have a leaf blower! Sign me up, i'll see you next week!" Says Bill

That night Bill is at the bar with Joe, telling him all about his new classes,
"Logic?" Askes Joe
"Well let me explain," say Bill "Do you have a leaf blower?"
"Nope"
"Then your gay"