Have you ever heard someone vocally disapprove of a relationship (one that they heard about on
Since the characteristics of the people you have liked comprise your "type," I would thus argue that when you like someone that isn't your type, their characteristics become a part of your "type." For example, when Cedric likes the short girl, he'll have to find another characteristic besides tall that describes all of the women he's been with. Instead of tall, rebellious, and cunning, his new type may be funny, rebellious and cunning. When you date someone that isn't your "type," they then become your type. Thus, the argument "I can't date him because he's not my type" doesn't really work.
Since "types" can't be used as an excuse not to date someone, what are they good for? Well, they can be used as an excuse to date someone. In order to develop a "type," we look at one's previous failed romantic interests. For example, one characteristic that all of Cedric's failed romantic partner's share is "rebellious." Dating rebellious girls obviously hasn't worked for him, so maybe he ought to reevaluate serially dating rebellious girls. All along it has been implied that we should date someone that matches our "type," (shares characteristics with people we have had failed relationships with in the past) when in fact we ought to try not to date our "type" since those failed relationships, well, failed.