>>275414860
From my experience. The best lubes are water based. Get a very good, kitchen thermometer, made to be submerged in liquids, I can't stress this enough, you want the water to be between 36.6 celsius and 39, anything more or anything less will feel very bad and you risk damaging the delicate tissue inside. If you've got time for that, submerge the hose and the applicator in warm water, or wash them with warm water for inside to avoid colder streak of initial water.
Take it very, very slow at first, and consider only 1L. You are probably capable of taking up to 2.5L before it gets painful, but you need to ease into it.
Doing one every now and then is okay, but treat it like exercise, it's better to do it 3 times a week moderately rather than one time and ending up with an injury because you took it too far.
Don't overdo it and let your intestines recover, so do it on and off, weekly.
I have no experience in coffee and other kinds of enemas, if you do it for health.
Don't let out the water right away, consider doing light stretching, some light cardio exercise to give it a good shake, imagine yourself as a giant drink shaker, you really want to give the stuff inside you a good so the water reaches everywhere. Enjoy the moment of release, it's comparable to stepping out of a hot sauna after a long, hot and steamy 45 minutes. Don't get addicted to it! You don't want to wash away your intestine fauna with frequent enemas.