In one of our three bathrooms and on the beach at dusk. In the bathrooms I can hang my bucket (I use a siphon with it) on a hook behind the door. Then I either lean over the toilet or lie in the tub. It's easier to get my colon tube up lying in the tub, though.
I've taken enemas outside from the garden hose, too, and expelled into the gulley under a garden tap (mine run into the septic tank). The hose does a better cleanup job than toilet paper, too!
Beach enemas are exciting. Of course, there's the enhanced feeling of exposure, and the fear of geting caught! But the challenge of getting the seawater into me is fun, too. I dress in speedos and a shirt (it's warm, here). I can usually go empty handed on a walk with the dogs, and pick up an empty 2 litre milk or sorghum beer jug or two along the way. That kind of rubbish often ends up on the beach; even on our deserted beach. After washing this out well with coarse sand and seawater, I fill it right to the brim and retire to the edge of the coastal bush. There's usually a shallow alcove that allows me to see any other late walkers before I am seen; but the joy of my technique is that what's going on is not obvious to a casual observer.
Finding my spot, I place the jug on the sand and squat over it, pushing my speedos aside so that the jug's mouth covers my anus. Then I just bear down! The jug crumples, the water rushes into me in a delicious cool squirt, and I sink gently to the sand. About a litre and a half will go in this way from a full jug. Then I get up, stroll down to a nice rock pool and blow into the jug to re-inflate it. Quite clean - it hasn't been inside me! Refilling it, I repeat the process, perhaps twice more until I'm groaningly full.
Then I see how many steps I can take, going on with my walk, before I have to release. The record so far is about five hundred. To expel is easy, too. Making my way to the top of the beach, I scoop out a hole in the sand and nudge the speedos to one side again. Then I sit down with my legs in front of me and let go! There's plenty of sand for a rough clean up before I walk on (it's almost dark, remember). I may do this two or three times as the waves of expulsion cramps hit me. If I want to I can lie down to expel,too (but it's best to take the speedos off in that case!)
At the end of the walk, I stroll into the sea and wash myself clean before walking home. At no time am I naked, and only an acute observer who happened to be looking at exactly the moment I move my speedos would know what I was doing.
Seawater tends to repeat, though. I will be chased back to the toilet later in the evening! All very nice!
Johnny