system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why isn't the human race getting more and more attractive?

Science is not my strong point and this question puzzles me.

People of all levels of attractiveness reproduce, but it seems likely to me that the MOST attractive people are somewhat more likely to reproduce than the LEAST attractive people. This suggests to me that the physical features which make people conventionally attractive should be passed on more and more frequently, resulting in a progressively more and more attractive populace.

Why isn't this the case? ...or is it?
gpt
There are different conceptions of beauty, and a lot of them are just cultural, not genetic. Being fat was all the rage once upon a time, and there are still some devoted to the more rotund. In some places a tan is considered great, in others a deathly pale is what gets people going.