For my own part, I’ve noticed that most of the people I know prefer that their sexual partners be far more dissimilar to them than I do, at least when it comes to secondary sexual characteristics. Of course, I realize that’s not what anyone means when they talk about partners looking or being similar. But it suggests that the issue is more complicated than a simple similarity metric would take into account.
For my own part, I’ve noticed that most of the people I know prefer that their sexual partners be far more dissimilar to them than I do, at least when it comes to secondary sexual characteristics. Of course, I realize that’s not what anyone means when they talk about partners looking or being similar. But it suggests that the issue is more complicated than a simple similarity metric would take into account.