Super Glue

A salesman rang the door bell and little Johnny answered.

The salesman asked if his father was at home.
Little Johnny: "Yes."

The salesman: "Well, can I see him please?"
Little Johnny: "No, he is in the shower."

The Salesman asked if his mother was at home.
Little Johnny: "Yes."

The Salesman: "Well can I see her?"
Little Johnny: "No, she's in the shower too.."

The Salesman: "Do you think they will be out soon?"
Little Johnny: "No."

The salesman asked why.
Little Johnny: "Well, when my dad asked me for the vaseline I gave him some super glue instead."