I've had a similar experience to the OP and also Emily in that Anal just isn't for me.
One thing I've noticed is that some clients may try and 'convert' you, convince you you've not been doing it right because all women they've had sex with 'love it'. Oldest line in the book paid for or not
.
You will get those who'll offer crazy money, or just a bit extra for you to provide it but they usually either are getting off on talking about it and aren't bookers, or simply think cash is the only reason you are withholding.
It simply makes me feel ill, as if I've had a bad curry during and afterwards unless he's been super careful and built up slowly then there's pain for days. I have no need to make myself feel that horrible in order to make a good living, with plenty of happy clients so just will not do it. In my personal life it's also a no go because feeling horrible withstanding it doesn't get me going in the slightest (although until I had exhausted trying it to see if I could get used to it I was turned on by the idea but that's passed now!).
I also have an aversion to strap ons, I just don't like poo. I will offer prostrate massage, condom on finger which really turns some men on and have used small vibrators and toys on clients who are scrupulous with their hygiene(which also means making sure they are clean in this area).
You will get clients who'll say it's a deal breaker, but just as many are horrified at the thought of it.
I'll not forget the day when I was told vaseline is the best lubricant for anal