Hello,
I was on the receiving end of partial anal pentration, no ejaculation, from a partner who's status I can't say I know. We also tried deeper penetration, although I insisted on a condom for that (although unfortunately regular lotion was used for lubrication). There was no ejaculation with the deeper pentration, either, with which I didn't want to go very far. I did note a small amount of blood afterwards.
Just how risky was this? I just had testing, with no more planned until February (it's the beginning of December now). Should I revise that? Can you put this particular risk in some perspective? Definitely no plans to repeat.