An elderly couple is vacationing in the West. Bob always wanted a pair of authentic cowboy boots. Seeing some on sale one day he buys them, wears them home, walking proudly.
He walks into their hotel room and says to his wife "Notice anything different, Martha?"
Martha looks him over, "Nope".
Bob says excitedly, "Come on, Martha, take a good look. Notice anything different about me?"
Martha looks again, "Nope."
Frustrated, Bob storms off into the bathroom, undresses and walks back into the room, completely naked except for his boots.
Again he asks, a little louder this time, "Notice anything DIFFERENT?"
Martha looks up and says, "Bob, what's different? It's hanging down today, it was hanging down yesterday, and the dang thing will be hanging down again tomorrow."
Furious, Bob yells "AND DO YOU KNOW WHY THE SON-OF-A-GUN IS HANGING DOWN, MARTHA? IT'S HANGING DOWN BECAUSE IT'S LOOKING AT MY NEW BOOTS!!!"
To which Martha replies, "Shoulda bought a hat, Bob".