Knock knock . . .

A man went to answer a knock at his door and upon opening it, found a huge cockroach. “Yes?” asked the man. “What can I do for you?” Instead of answering, the cockroach slapped the man and ran off.

The next night there was another knock at the door. When the man answered, he found the cockroach once again. This time, the cockroach kicked the heck out of the man and ran off once more.

On the third night, there was a familiar knock at the door. The man cautiously opened it and no sooner did he peek out than the cockroach bit him and took off.

The man was so worried about the bite that he called his doctor and told him the whole story. “What is going on?” the man asked.

“Ah, yes,” the doctor said. “There’s a nasty bug going around.” 

Oh come on-you know it’s funny.