Sweet Substitute (1964)

Busy navigating his final year of high school, brainy aspiring teacher Tom is determined to land an elusive scholarship, but his hard work is constantly interrupted by his real obsession: pursuing the opposite sex. Before long, he develops a romance with former classmate Elaine, who persistently declines his sexual advances. This inspires Tom to consider other options, including his good-natured study buddy Kathy. But when they take their friendship to the next level, shocking complications threaten to derail Tom’s future, inspiring his friends to take drastic action.