Just use an enema beforehand.
Worry about getting an ass licker first though, you're putting the cart before the horse anon.

Then just stop drinking for a while?

I wouldn't let a girl eat my ass if I've had diarrhea recently, even if I cleaned myself up. Would be too self conscious to enjoy it.

Can take diarrhea pills, that'd block you up for a few days but it'd keep you clean. Shower before hand, scrub hard.

getting rimmed feels like heaven

>>28919896
I'll do that and then I'll get on my unicorn and ride through the countryside
>>28919944
The self conciousness is why I put the kaibash on it anytime a finger starts moseying on down even though I'd love them to keep going

Just don't tell her about your diarrhea and let her eat that too.