(Excuse me for talking about my husband again. I'm basically obsessed with him)
My husband and I often get told that we are a very "cute" couple, even though we're not particularly affectionate in public. It seems to be based on what we look like. Just yesterday, someone mentioned it again, and he and I happened to be dressed very similarly. We had just come from the gym and were wearing black t-shirts with lettering, black exercise pants, Birkenstocks, and Fitbits. This was just a weird coincidence, but I began to wonder if people see couples who look like they "match" and automatically think that is a good pairing. I wonder if people are automatically rating the attractiveness of each person, and if the numbers match according to their perceptions, then the pairing makes sense, and is easy to digest and look at favorably.
In the video from The Science of Sex Appeal it shows how people do this when they are trying to find partners/mates. In the real world it certainly doesn't occur so consciously, but people are aware of who's "out of their league" or when they think they could do better. I don't remember having this specific thought process, but I can admit to being shallow enough that I wouldn't have pursued my husband if I hadn't thought he was attractive, and I probably would have been intimidated if I thought he was out of my league. Based on the concepts presented in the video and lecture, I think we are relatively well-matched in many different aspects. It's something I take comfort in, and it's one of the reasons I never like to be over- or under-dressed compared to my husband. I don't like the mismatch.