Vasaline

A man doing market research knocked on a door and was
greeted by a young woman with three small children running
around at her feet.


He said, "I'm doing research for Vaseline. Have you ever used
the product?"


She said, "Yes. My husband and I use it all the time."


"And if you don't mind me asking, what do you use it for?"


"We use it for sex."


The researcher was a little taken aback.
He said, "Usually people lie to me and say they use it on
a child's bicycle chain or to help with a gate hinge.
But in fact, I know most people do use it for sex.
I admire your honesty. Since you've been frank so far,
can you tell me exactly how you use it for sex?"


The woman said, "Sure. My husband and I put it on the
door knob to keep the kids out."