I quite simply tell them no, I try and keep it light and friendly and will often give a small chuckle along with not in my bookings hun sorry I don't play bare ever., I will also if they are trying to hump me put my hand over my bits and twist my hips to one side and tell them the pink bits don't meet till the cover is on.
I've had very very few issues with this approach and only had to actually stop 2 guys and ask them to leave in my 9 years working.
If I get the I can't stay hard with a condom then I tell them it will be oral and hand only then. The same goes for condom wilt, there are many ways to satisfaction that do not involve my fanny and it's always a no to Cumming over it as well.
If they have been an utter pain in the arse then I save them as such and simply don't allow them another booking or block them.
Thanks yes I usually bat it off, tell them I don't have unprotected intercourse with anyone, explain better safe than sorry. Some get the message, one person argued insistent he would show me his results, another mentioned it 3 times,
The most alarming was when a regular
thought he was inside me without a condom on, he remarked 'I didn't think you did it without'. I stopped to check yes condom still on, but for that split second my heart skipped a beat. I must have looked so horrified he apologised both then and later. Can't remember the exact sequence but we'd stopped then restarted intercourse, he either hadn't noticed I'd replaced the condom, or he thought I'd removed without replacing. But he was quite happy thinking he was condomless. My horror was two fold, part safety but also because I've never ever had unprotected intercourse with my husband (we have always used condoms. If I would ever have unprotected I'd want it to be with him, but this won't happen whilst I'm having sex with other partners.
To go back to the OK I tend to judge each enquiry individually, depends on how the person comes across. If he's been difficult or an idiot it's an easy reason to stop and refuse. What's very interesting are those who reason 'You don't offer it so I figure you are safe to have unprotected sex with', or the enquirer says they are married 'therefore clean and safe for unprotected intercourse'.