I have never had an enema so I can't comment on that exactly. However I largely attribute my general interest in medfet to my experiences as a child and young adolescent. Growing up in a fairly large family with two siblings and two step siblings and with a Mother who, looking back clearly had some issues with regards to obsessive cleanliness rsulted in some very memorable and quite traumatising events. Her 'big two' concerns with regard to our health were Head Lice and Pinworms. Any mention, rumour or suspicion of an occurence of either of these in any one of our school classes would result in a mass screening asap.
Now clearly, being screened for headlice by your mother was no big deal; just stand there over a white towel while she combed through your hair with a fine tooth comb; the only fear being that she would find some lice and you would have to endure the foul smelling shampoo, not to mention the feeling of being ostrecised!
Being screened for pinworms however was an entirely different ball game. First came the group embarassment of being asked together with my siblings whether any of us had been suffering form an itchy bottom. Regardless of the answer, we were then informed that for the next few days, every time we went to the bathroom for a 'number 2' we were not to flush the chain until we had called Mom up and let her in to the bathroom to have a look at what we had just left in the toilet!
What we all came to realise was that the embarasment wouldnt stop there. Though this was never mentioned at the time of the 'announcement', after we had been forced to let Mom in to the smelly bathroom (in itself a source of embarassment for a young teen) and watch helplessly as she closely looked in to the toilet bowl we were then made to submit to a visual check of our bottoms. Standing, facing the bath, bent over with our hands resting on the side of the bath, Mom would crouch down, pull our cheeks apart, before going deeper and actually pulling our rectums apart to check deeper for signs of those dreaded white pinworms.
Though we never spoke of it to each other, we all knew what was going on in there the moment we heard the familiar slightly hushed and embarassed cry of 'Mooooom' coming from the bathroom, not to mention the information gleemed from the not so subtle walk past the bathroom to evesdrop!
Thinking back, I often wonder whether it was all strictly necessary or as you said a form of sexual exploitation....