A male market researcher was calling on homes on behalf of Vaseline.

A male market researcher was calling on homes on behalf of Vaseline.
A woman answered the door."Do you use Vaseline?
" asked the researcher.
"Certainly," she said.
"It's very good for cuts, grazes and burns." "And what about anything else?
" he asked.
"Like what?
" He became embarrassed.
"Well, sex, maybe." Oh, of course." she said.
"I smear it on the bedroom doorknob to keep my husband out."