There was perhaps not being accepted by your love interests peers and so on. Watching this film I could understand how Duckie felt. I could feel his anger when he watches his best friend, and his secret love interest, date the personification of what ( and Andie ) consider the personification of snobbery. She has probably complained many a night about how she is tired of being treated unfairly just because she wasn't born with a silver spoon in her mouth, and now she dates one. I could feel Ducky's pain.