Bob always wanted a pair of hardcore motorcycle boots; so seeing a pair on sale, he bought them and wore them home. Walking proudly, he sauntered into the kitchen and asked his wife, "Notice anything different about me?
Sandra looked him over and said, "Nope."
Frustrated, Bob stormed off into the bathroom, and got completely naked except for his new boots. He then returned to the kitchen, and asked Sandra, a little louder this time, "Notice anything different NOW?"
Sandra looked him up and down and exclaimed, "Bob, what's different? It's hanging down today, it was hanging down yesterday, and it'll be hanging down again tomorrow."
Furious, Bob yelled, "AND DO YOU KNOW WHY IT'S HANGING DOWN SANDRA?"
"Nope," she answered.
"It's hanging down because it's looking at my new motorcycle boots!"
Without changing her expression, Sandra replied, "Shoulda bought a new helmet, Bob."