Please help me. I watched a movie in '91 or '92 on USA's Up All Night. What I remember is the school's "easy girl" nicknamed "Peanut Butter" agreeing to go out with a nerd as a favor to a guy she likes. The nerd was helping the guy over something. She winds up falling in love with the nerd. Toward the end of the movie, the guy she did it for has to rescue his girlfriend off a boat when she's kidnapped. If it was on latenight around this time, it had to have come out of the 80's.
