Honestly, i don't really care.....i know why i'm seeing girls, and i don't ask about boyfriends. I exchange money for services, and that's about it. Sometimes we have a good chat and a good laugh, sometimes not, sometimes it's bang-bang thank you mam. I respect them in any case.
Only one time i felt i had something "more personal" building-up with an MP i was seing almost every week. We had those long moments when no one needs to talk, and you just feel good....you know what i mean. I never asked her out, maybe it would have worked, maybe not, but i didn't cross the line.
All in all, if the service is good and i'm not treated like shit, i don't mind the boyfriend/no-boyfriend situation.