Maybe the girls want an easier job instead of being drilled by a BBC, don't tag everything as discrimination.
Im not sure why all the hate for VanHorn's comment? Sure its a generalization and maybe you didnt like his tone, but there is truth to it. Ive also heard the rumour that black guys get refused because shops/handlers think most pimps are black and trying to steal girls? Im not so sure i believe that.
Im a white guy thats packing fairly large so of course when im booking i have no problems. But when some girls (of any race) see or feel my size they are clearly unhappy and just want it to end. Sometimes they make no qualms about my size, how deep im going, how hard im thrusting, the angle of penetration, etc. And im not even doing anything out of the ordinary. This type of attitude and session benefits nobody and its incredibly frustrating. I have been in this situation dozens of times. I'd rather be told to put my clothes back on right away and told the session is off.
I should also add that i see this more often at the lower price range for all races, and the more you pay the less likely I see this. Asian aunties and young travelling girls at the 100-140 range are the worst for this