Plastic White Female

Bobby is worried because he's been invited to his first boy-girl party, where the kids will play Spin the Bottle.  Luanne is worried because she has a big hairstyling test coming up.  When Luanne brings home a plastic "practice head," Bobby secretly starts using it to practice interacting with the opposite sex.  To Peggy's horror, she walks into Bobby's room and finds him kissing the plastic head.