In this case, gender is less important. And as always, the only 100% risk-free activity is abstinence.

In porn productions, they call it "ass-to-mouth,"
The Love Goddess

is not "ass to mouth" as it is referred to in porn. Ass to mouth is the act of a woman performing fellatio on a man after his penis has been inside her anus.  A variation of this would be performing the act after the man's penis had been in another woman's anus.

I was making an ironic comment on the general state of potential doodoo/illness explosure in my closing line,

The Love Goddess

LG,

First, I hope this is the right forum for this question.  Second, despite the tongue in cheek (no pun intended, okay, maybe a little) subject line, this is an honest question.

Until recently I had never experienced rimming.  Unexpectedly, I actually enjoyed the experience, and wouldn't mind partaking again.  However, upon further reflection, here is my concern: In my experience a pre-shower is always required, with the other party thoroughly washing my nether regions.  After the clean up, the rimming usually begins, and it transitions to the usual acts of BJ and covered intercourse.  Typically during this time kisses are exchanged.  Magnify this by however many other people the other party has seen (that day, that week, etc) and the thought becomes a bit disturbing.  Isn't the "rimmer" putting themselves at risk healthwise?  Which may have implications for me (ie, do I have any cause for concern here, healthwise?).

Thanks in advance for your response.

EOM

The rimmee must make sure they're very clean (and there's nothing wrong with a couple of enema flushes before ass play). The rimmer shouldn't push their tongue too far beyond the sphincter. Either way, there's a risk but you can certainly lessen the risks with a little preparation...

Have fun!!!!