>>2171499Because a lot of yaoi is made by women for women. And in a lot of cultures, women are discouraged from being sexually aggressive. Because of this, many women may feel more comfortable lusting after/self inserting as men who have hyper-feminine traits, which they might be more familiar with. The traits can include but are not limited to daintiness, being emotional, needing to be protected, etc. I, personally, see those preferences as part of an underdeveloped and under-explored sexuality.
But, of course, there are always exceptions. TL;DR We just have refined taste, friend.
