All subsets of "People who corner you at student parties and try to pull you by telling you how much cleverer they are than you".
You can experience the feeling of being one of these people by doing the following (courtesy, S. Lee and R. Herring)
1. Say to someone "Name something you think I wouldn't like".
2. Listen to what the person says, such as "I expect you're not a fan of the comedy routines of Jim Davidson".
3. Say to the person, "Aaaah, no! You're wrong! I love the comedy routines of Jim Davidson! I think he's really good and have all of his adult pantos and Big Break trick shot compilation tapes featuring John Virgo dressed as a genie!".
4. The person, having had their expectations confounded by you, will be surprised by your intelligence and insight, and will want to do a sex with you.