Obviously, it's the primary service for the large majority of female escorts but given you are offering submission too, you could be in an easier situation. Especially if you also offer anal.

Simply say that your Master / Mistress has decided that, while they will still offer you to be used by others, vaginal sex is just for them? Even if you don't have one.

I doubt anal is everyone's cup of tea . . .

I do get to read that some people get busy douching for up to 1 hr 30 min+ to prep.
Must be sooooo exhausting.   

Slightly OT, but it might be worth trying to find out why you keep getting infections? Does it happen even in gentle sex with a lesser-endowed man?

I agree, I had a time years ago when I would get recurring UTIs, it was triggered by going back to work too soon after the first one. If you are high volume I guess that could be a factor too.

If it was me I’d get checked out at the same time as getting screening to see if there was a reason for this.

As to stopping VS, you don’t actually have to give a reason, you could make up a physical injury, but that might just get complicated.

Or you could do as XW5 suggests.

xw- Yes, I offer anal as well. The majority of my bookings are sub bookings and I've had long term regs for sub bookings for many years (Well, except the handful who all decided to mysteriously vanish just before Christmas!) but I don't want to lose out on potential bookings when new clients see that vaginal isn't on offer or for the clients I already see to stop seeing me because of it. I think I will focus my ads solely on sub services and anal to counter that along with using your line about a Master forbidding vaginal. Thank you.

Kay & SS: It happens almost every time during vaginal even if it is really gentle and the client is small. I'm not high volume, I see at most 6-10 a week and usually not even that many.  About half of those are oral only or sub bookings without penetration too and I don't work on the weekend so a small break there too. I have gone back to SW as soon as I feel better, only to get another UTI and gone back over a week after finishing antibiotics and gotten it pretty soon again, so I don't think it is a case of returning too early. I don't know what it could be! I'm due for a screening though, so I will ask about that. Never thought about asking the GUM clinic about this issue before! Thank you.

regieeee & sultress: I douched once for anal when I first started. Far too much effort and faffing about and have never douched for it since. Not had an accident yet!

As for telling clients? I would just be honest and say that it causes UTIs. I know it isn't the sexiest of reasons, but it is straightforward and very plausable, and as others have said, you don't need to explain.

 I stopped including/allowing ‘fingering’, and now I get a few annoying clients who will try and push the matter/try to finger during a session.
When I push their hands away and say no Thankyou. They smirk and ask why I ‘don’t like it’ ..
I simply reply : “thrush”.
They typically stop trying then and move onto something else. Hah. X

Also try looking at D mannose powder on amazon.. Its extremely highly rated for recurrent cystitis/uti's