The one thing I notice, well, 2 things, is us being swingers we have been to many events, including Splash Mocha 4 times, is that many, and this may be stereotyping, but many white men fuck with their entire body, like they are having a seizure. Black men use their hips, while their legs and upper body are mostly still. Not being a woman, I am not sure how this feels, but when women I have asked about sex with black men, and they said "I love the way they fuck", I think the motion of hips vs. the entire body might make a difference. And too...... I will say, again seeing in real life, not only can black men nut 3 and 4 times, but many can nut and continue fucking w/o a refractory period. Like me, once I cum, I am about done, which is why I have had to try to fake cumming when we are swinging. If I do cum, getting older, NO idea how long it will take me to get it up again. I have even seen grey haired black men (so not sure how old, but not young bucks) nut, and keep going. (at least from what I could tell in the limited lighting, they nutted)