Thanks for the thanks. I'm glad you and others have found this new forum useful.
A comment about testing, which I have said before: In general, because the chance of acquiring HIV from particular exposure always is fairly low, even for unprotected anal sex among men, testing after any particular exposure isn't the wisest approach. It's better to just plan on regular testing, from every 3 months to once a year, depending on lifestyle and risks.
To your particular questions: 1) Generalizations always are dangerous. My statement that most transgendered persons are HIV negative undoubtedly has many exceptions. It depends less on transgender status than it does on traditional risks. For example, some male to female transsexuals seek out primarily heterosexual male partners prior to surgery (they are women in men's bodies, after all, and their sexual tastes tend to reflect that). And not all transsexuals have multiple partners. And escorts often are experts in sexual safety and pretty good at protecting themselves. But I am unaware of any data on these things, and certainly not on HIV prevalence in transgendered commercial sex workers; just educated guesswork (although not just by me; most experts probably would mostly agree with me).
2) Oral exposure to HIV generally is low risk, and I doubt rimmers are likely to acquire HIV by the practice. But I am unaware of specific data on rimming.
So from a risk analytic perspective, I don't think you need HIV testing. But if you have been sexually active and haven't been tested in a year, perhaps this is a good time to do it. And my advice about the lack of medical/epidemiologic need for HIV testing (i.e., too low risk to worry about it) is always tempered by recognition that some people require it anyway for peace of mind. If that applies to you, get tested.
Good luck-- HHH, MD
THanks again for your efforts on this forum!