"Peggy Sue's not ready yet, so why don't you have a seat?" she says.
Peggy Sue's mother asks Harold what they're planning to do.
Harold replies politely that they will probably just go to the coffee shop or a drive-in movie.
Peggy Sue's mother responds, "Why don't you go and screw? I hear all the kids are doing it."
Naturally this comes as quite a surprise to Harold.
"Yeah," says Peggy Sue's mother, "I know Peggy Sue really likes to screw; why, she'd screw all night if we let her!"
Harold's eyes light up and he smiles from ear to ear. Immediately, he has revised the plans for the evening. A few minutes later, Peggy Sue comes downstairs in her little poodle skirt and saddle shoes, she announces she's ready to go.
Almost breathless with anticipation, Harold escorts her out while Mum is saying, "Have a good evening kids," with a wink at Harold.
20 minutes later, a thoroughly dishevelled Peggy Sue rushes back into the house, slams the door behind her and screams at her mother:
Spoiler: