I was outside in my yard the other day and I noticed my new neighbor was outside as well, so I hollered over the fence to introduce myself. I said to the fella, "So what do you do, buddy?" And he says to me, "Well, I work down at the university over there. I'm a professor on logic." So I says to him, "Professor of Logic, huh? What's that all about?" And he says, "Well let me give you an example. I see you got yourself a doghouse there, so I can guess you've got a dog, is that right?" I said, "Yep that's right". He continues, "And if you got yourself a dog you probably got yourself some kids, is that right too?" I said, "It sure is." And he continues, "So if you've got kids, you probably have a wife, is that right as well?" I said, "Wow, yep, that's right too!" And he continues, "And if you've got yourself a wife, then you're a straight male, right?" I said, "I sure am". So he explains, "So you see, simply because I saw that you had a dog house I can deduce your sexuality." I said, "Wow! That's really interesting!"
Well later that day I'm down at the bus stop waiting for a bus and I strike up a conversation with another fella that's waiting too. I said, "I met my new neighbor today. He's a professor of logic down at the university, there. Isn't that interesting?" And this fella I just met says to me, "A professor of logic? What's that all about?" So I says to this fella, "Well it's easier if I give you an example. Do you have a dog?" And he says, "Nope". So I says to him, "Oh, so you must be one of those gays!"