@Mindself you'd be surprised at how many couples in real life look "mismatched" or seem to come from completely different walks of life. They're not the most common, but I've seen pairs of people looking like this, or with an even greater divide in appearance.
Bordering on unfaithful if you ask me. Being a dumbass is all good and well, but if you're dumbassery leads you to go to a mixer when you're already in a relationship, I'd consider it too far.