My wife gives me an enema most weekends (unless we are travelling or have visitors) for health reasons and because they are a huge turn on for me. Generally I take 3+ quarts, and she gives me just a little at a time (the technique shown in the Optimal Health Network's video on giving a large volume enema). She gives me longer breaks than they do in the video, so the process take can take 20-30 minutes. I frequently tell her she can speed it up if she'd like, but I believe she (a) wants me to hold it in longer for it to be more effective and (b) she wants to tease me for a good long time to build up excitement very, very slowly. Women are so much better than men at that sort of thing.
We start with me on our bed in knee-chest position and her gloving up. She'll then spread petroleum jelly on the nozzle and me. My second-favorite part of the entire process is when she slips her finger in and out of my ass to ensure I am fully lubricated. I usually lightly stroke my cock while this is going on, telling her how good it feels. She'll then gently slide the nozzle in, often eliciting a moan of pleasure from me.
I then lie down on my back and she lies perpendicular to me, laying her head on my thigh. Shell open the clamp and begin to fill me - just a little at a time. She just pinches off the hose when she pauses rather than use the clamp.
Usually for about the first ½ - ⅔ of the fill, she'll just lightly massage my stomach while we talk about mundane, everyday family stuff. I might throw in an occasional comment about the water temp or if I am having a particularly difficult or easy time taking the water, but she rarely mentions or even acknowledges the enema.
The truth is, she is actually pretty repulsed by enemas, and our sessions are only for my benefit - my reward for working hard all week for our family and to express her love and appreciation.
As we approach the last quart or so, she'll start to rub my cock while she fills me (and then back off and revert to massaging my stomach during pauses). The only conversation from this point forward is me telling her how good it feels or other words of appreciation and encouragement, especially in the last 3-5 minutes when she finally takes my now achingly-hard cock in her mouth. She tries to time my orgasm with the very last of the enema entering me, and she is amazingly good at doing so. My orgasms when we do this are incredible.
The session always ends with me thanking her as if she just saved my life and then saying “well, I must away” (always those exact words), which makes her chuckle. I head off for the bathroom toting the IV stand - hose still protruding from my ass.