"What happened to you feet?" his wife asked.

"I had a childhood disease called tolio."

"Don't you mean polio?"

"No, tolio, it only affects the toes."

He then removed his pants and revealed an awful looking pair of knees.

"What happened to your knees?" she asked.

"Well, I also had kneesles."

"Don't you mean measles?"

"No, kneesles, it only affects the knees."

When he removed his shorts his wife gasped and said,

"Don't tell me you also had smallcox!"