Yep "Eww ! ". although the smell can be masked very successfully buy using lots of Johnston's Baby Oil.
I saw doco on Norma Jean where her maid, nurse or whatever, would flush out Marilyn Monroe's bum hole with, what looked like, a kitchen funnel attached to a long rubber hose & a jug of water.
So anyway, I did try it on my lady, once, over a laundry sink. LOL, LOL and it was a frkn disaster & a frkn nightmare.
Anyhow, I'll never try that again.
One day, my lady had to have a Colononoscapy to check for polyps and the doctor gave her this laxative to mix with a bucket of water and to drink it, without food, over the preceding 24 hours.
It cleaned her really well & we took advantage of it that when she got back home from the doctor.
And so, since no one can answer my question, I guess I already have the answer.
The best way to get ready for anal sex is if you use a 24 hour medical, colon cleanse, to flush out all the fecal matter.