I've been messing around with an NJoy Pure Wand and Aneros Helix Syn for a few months now. Sometimes I can get a good feeling, but I haven't exactly had a fantastic time.
Part of that is because how much trouble it is to clean up afterwards.
I take a dump at least an hour before doing anything anal. I wash my asshole really well before putting anything in it. I have not used an enema, although I'm not sure that will change all that much.
When I finally pull either toy out, there are brown stains and maybe even a bit of shit on the toy. The smell is terrible. There's usually brown/watery stains on the towel when I'm finished, a mix of shit and lube. After thoroughly cleaning the Helix Syn with soap and water, it still has a pretty gross smell to it.
Last week, I used the Pure Wand and somehow triggered my system to shit everywhere. I ended up wiping my ass forever. I barely even had it inside me.
It's really hard to get horny and do anal play when I know how aggravating the cleanup is going to be. As you can tell, I'm frustrated, and I almost want to just stick with jerking off to avoid cleanup.
Source: http://www.reddit.com/r/aneros/comments/3is9oo/anal_play_is_a_lot_messier_than_what_ive_read/
yuck, i hate messy sessions. i use one of [these](http://ecx.images-amazon.com/images/I/311yNboYmRL.jpg) to give a shallow rinse to my rectum before putting anything up there. i coat the tool in vaseline/coca butter mix i got at walgreens. no smell, no mess. as for the shit reflex i can only offer the "relax" advice. hope i can help.