An ethical question

[rajpoot]

If you don't take black men as clients it's obviously racist, do I really care, no. You can pick your own clients if you don't like blacks that's up to you.

When you think about it, it's not that simple is it?
Even if prostitution gets legalised, it's not like other service industries. The factor of sexual preference will still be there.
If a person is OK with everything else, but not physically attracted to someone due to the colour of their skin, is that being racist?

Edit:
What if it were the other way around. What if a customer rejected a prostitute on the basis of skin colour? Will that be considered racist?