I also want to state, with the thyroid experiments, Ray Peat's experience with DHEA, and anything else he did that changed his body and appearance for the better is certainly appealing to anyone who wants to become healthier for the purpose of attraction and reproduction. Health and attractiveness are certainly intertwined, it makes no sense for an unhealthy organism to be attractive, especially an older organism who lacks the protection of youthfulness. When people balloon up at a certain age from all of the PUFA consumption, they are not healthy and their appearance shows this. A man or woman who peats/cleans up their body will certainly have a better chance with the opposite sex in a healthier state. So many people hold this idea that everything is genetic and they cannot change themselves.
I think it also makes complete sense why older men or women, especially married ones, wouldn't care about their looks as much as a man or woman in the peak fertility range. Almost everyone tries to change their look it in some way. Almost every young woman wearing makeup and almost every young man getting haircuts, going to the gym, and dressing a certain way. It just makes sense for people to try the hardest and have the most drive towards the opposite sex around a certain age range.