They generally speaking have the lowest barrier of entry as a collection and have less issues crossing racial lines for their own enjoyment.
Plus they tend to be more sexually loose and free esp in college years bc of their feminist (covert or overt) mindset + being white women they don't get as much flak as other races of women.
This is the biggest reason why. There are simply no repercussions for them being a hoe. It's thoroughly accepted within their culture and as far as I can tell this is a recent phenomenon as well.
Now this primarily extends to anglo saxons, and western Europeans. Eastern Euros tend to cluster with minorities as far as conservatism is concerned. All of this is on the down low of course. Unless they're from an ultra liberal family, and have nothing but humanities majors as friends, they will simply casually smash around and not tell a soul. The liberal variety will actually speak openly it, hense the wokehoe movement we see today