A man doing market research for the Vaseline company knocked at the door and was greeted by a young woman with three small children running around at her feet. “I’m doing some market research for Vaseline. Have you ever used the product?”
She said, “Yes, my husband and I use it all the time.”
"Excellent!" he says. “If you don’t mind my asking, what do you use it for?”
“We use it when we make love,” she said.
The researcher was a little taken aback. “Usually people lie and say they use it on a child’s bicycle chain, or to help loosen a gate hinge. Whereas, in actual fact, we know that most people do use it for sex. I admire you for your honesty. Since you've been very frank so far, can you tell me exactly how you use it?”
The woman said, “My husband puts it on the doorknob and it keeps the kids out.”