A woman answers the door to a market researcher.
"Good morning madam, I'm doing some research for Vaseline. Do you use it at all in your household?"
"Oh yes, all the time. It's very good for cuts, grazes and burns."
"DO you use it for anything else?" asked the researcher. "Like what?"
"Ahem.. err.. well.. during.. ahem.. How shall I put this? Do you use it during sex?"
"Oh God yes.' said the woman. "We smear it on the bedroom doorknob to keep the kids out.”