I got rimmed once, however, before the meeting I prepare and clean the area (eat properly 2 days before the meet) and had an extra shower at the prostitute flat before the action, just in case.
I feel absolutely nothing as it didn't turn me on, but she seemed to enjoy what she was doing as she spent good 15 minutes doing it.
Then with a different young prostitute, I tried to do on her but to be honest, I didn't enjoy it at all, in my head was the thought that "body solids" passed through that place and that made me stop doing it, so instead of being a big turn on, now it's just something I won't do.