Hot water can burn (obviously) and cold water, in a worst case .. If you're going to do an enema before anal, you need to go all the way with it. There are different ways to give yourself an enema or anal douche, but Each time you rinse, let the water flow in slowly until your rectum feels full. Then sit. George* has a harrowing story about using an enema before anal sex. When we douche, the force of water propelled into the colon goes.