I agree @FableLies.
@littlemissworry97, you keep trying to assure that this is "light". But consider that the notion that people that who are "mismatched" in levels of attractiveness is very surprising and worth plenty of headspace is not "light" at all but is quite problematic - it reflects a shallow, commodified view of human relationships and tells the world that on some level, you assign people a market value based on an imaginary attractiveness scale. When you and others express surprise at couples who don't conform, particularly when men appear more attractive than their female partners (which in itself shows the depth of your gendered expectations), you're buying into gender stereotypes that say a woman's worth is primarily tied to her appearance.
Your "surprise" suggests you have some problematic assumptions: that attractive people "deserve" equally attractive partners, that attractiveness is the primary sorting mechanism, and that "mismatched" pairings require explanation or justification. Your "surprise" (that I think might actually be discomfort, jealousy or envy, on some level) witnessing these couples exposes how deeply you've internalised beauty standards that cause real harm, but every time someone on this thread expresses their vulnerability around this you dismiss them, patronise them, and in one case have ganged up on them with another poster ("it's always the insecure ones"). Your reactions actually aren't innocent observations, despite you thinking they are, but active participation in social systems that rank human worth by appearance.
When you're surprised by couples who don't fit your visual expectations, you're revealing more about your own limited understanding of what makes relationships meaningful and long-lasting than about the couples themselves.
It's a shame that you're becoming defensive when you're criticised and forming camps within the thread. Introspection about some of your beliefs and values could be life changing. And your expressions of discomfort at your own reactions, the hedging language and disclaimers, the euphemisms and coded language, shows that you know you have some problematic beliefs deep in you somewhere. Get them out and examine them! You won't regret it.