An elderly couple, Rose and Jim, moved to Hamilton, Texas.  Jim had always wanted a pair of authentic cowboy boots, and when he saw that a store was having a big sale on them, he bought a pair and wore them home.

Walking proudly, he sauntered into the kitchen and asked his wife, “Notice anything different about me?”

Rose gave him a quick once over and replied, “Nope.”

Frustrated, Jim stormed off into the bathroom, undressed and walked back into the kitchen, this time completely naked except for his new pair of boots.  A little louder this time  he asked,  “Notice anything different NOW?”

Rose looked up and replied, “Jim, what’s different?  It’s hanging down today, it was hanging down yesterday, and it’ll be hanging down tomorrow!!”

Furious now, he yelled, “AND DO YOU KNOW WHY IT’S HANGING DOWN, ROSE?”

“No,” she replied.  “But I’m sure you’re going to tell me…” 

“It’s hanging down, because it’s looking at my new boots!!”

With no change of expression whatsoever, Rose replied,

“SHOULDA BOUGHT A HAT.”