I really don't think it has any biological foundation.
Even though I believe that nearly everything about humans can be explained by evolutionary/reproductive biology, to me this seems pretty much wholly based on social constructs. Of course, however, I am fully open to look at evidence that says otherwise.
Shaming another man's taste in women just because it's different to yours, in terms of biology, seems very paradoxical as well.
For example, I am White and I've got serious Yellow Fever. I pretty much only go for Asians. If I find out another man likes White girls, how would I benefit from trying to prove to him that Asian girls are better? In fact, it would be better for me if he were to only go for White girls as it means that there is less competition for the Asian girls!
Even though I believe that nearly everything about humans can be explained by evolutionary/reproductive biology, to me this seems pretty much wholly based on social constructs. Of course, however, I am fully open to look at evidence that says otherwise.
Shaming another man's taste in women just because it's different to yours, in terms of biology, seems very paradoxical as well.
For example, I am White and I've got serious Yellow Fever. I pretty much only go for Asians. If I find out another man likes White girls, how would I benefit from trying to prove to him that Asian girls are better? In fact, it would be better for me if he were to only go for White girls as it means that there is less competition for the Asian girls!