i could never find it, but my favorite of all time went like this
guy shows up to pick up girlfriend at her parents house. Mom and girlfriend are all excited about meeting the boyfriend, but dad is giving him the disapproving eye. Sneering, the dad turns to the boy and says "i know you'll bring us back our girl EXACTLY as she is now"...after an awkward silence, the guy smugly says, "sir, my intentions towards your daughter are as good as the ones you had towards your wife". Mom and girl hug and kiss the guy, the dad has a look that says "oh sh*t"
I love it, hopefully someone will find it