Fuck yea, I'd be so embarrassed to leave a choco anything on a guy. I make sure vag (for tongue action) and balloon hole are squeaky clean.
My gals gay bro told me enemas prior to anal winds up being a bigger stinkier mess, old shit from who knows when comes out, then there's leftover slurry that the suction pulls out of the deeper bowels....porn stars will tell you the same.....best thing is massive doses of immodium AD, so if they do strike gold it's a solid nugget and gets shoved back up...
And now you know and knowing I'd half the battle....Go Joe!