A frustrated wife buys a pair of crotchless panties in an attempt to spice up her dead sex-life. She puts them on, together with a short skirt and sits on the sofa opposite her husband. At strategic moments she uncrosses her legs... enough times till her husband says... "Are you wearing crotchless panties?"
"Y-e-s," she answers with a seductive smile.
"Thank God for that... I thought you were sitting on the cat."