I'm horny before an enema session -- no matter whether giving or receiving -- for the simple reason that my enema lust is constant, year in, year out. Of course, and to borrow a boiler operator's term, you can't meet the requisites of everyday life with the "enema flame" permanently turned up to high-fire. The fire has to be banked if we're going to take care of daily business -- going to work, tending to the family, maintaining the abode, doing the shopping and so on. But the fire never goes out for me, and it can be turned up instantly and anywhere by the right input: hearing mention of the word; seeing the equipment on the drugstore shelf; randomly running across a person who "has a page" in my mental "catalog" of preferred types for enema play. At present, and for reasons I can't state, my ideal type is a mature, olive-skinned, rather sharp-featured woman of stern countenance, authoritarian in temperament, well breasted, a bit wide through the hips, with a plump, prominent ass. But that ideal morphs through a wide range with time -- again, for reasons I don't know. And one of the beauties of my fetish is flexibility: I can stray from a current ideal completely, and still feel great excitement over the prospect -- unfortunately only imagined, 99.99% of the time -- of sharing an encounter with the person I'm looking at or thinking about.
As a giver, I agree absolutely with Moppys Jalopy: the sight (or thought) of a waiting anus, with a patch of brown puckered flesh surrounding it, is enough to take my breath away. I'm even further excited by a decidedly fleshy and supple buttocks that quivers and ripples at the gentlest touch or movement -- much preferred over the toned and "cut" glutei of the exercise-obsessed. I've had the pleasure of being a giver to both women and men, but the numbers are extremely small in both cases. The only steady receiver (and also an avid giver) I've ever had was a nurse I met sometime after my ex-wife and I divorced. That came to an unwanted end when she returned to the Philippines. Before her departure, I'd go through each workweek in a state of agitated anticipation of coming Saturdays and Sundays, which, unless we had other plans, meant resumption of playtime, always including enema giving and taking. Frequent thoughts of lubricating her deep brown anus with my bare finger and then watching it accept the nozzle drove me crazy through the week. So again, I was "horny" before the bag came off the hook on her bathroom door; I was savoring the sensations of giving and receiving for days before actual gratification was to be had.
As a receiver, I can label both my ex-wife and nurse-girlfriend steady givers. Anticipation of submitting to each of them, in their time, was with me constantly. It was often playing in the background, but never too far from full consciousness. With the "ex", the game, once we got it established, was dominant/submissive, she having the dominant role exclusively. For the hundred-plus enemas she gave me, I gave her maybe three or four in total, all in the very early days. She taking the receiver role just didn't fit the game as we played it. Then, with the girlfriend, it became a mutual exchange. The giver had, of course, momentary command of the situation, so to that extent, the dom/sub element was present. But in tone and intensity, role distinction was not at all like it was with the "ex". Both had their own unique benefits and minor shortcomings.