At age nine after being in the hospital 14 days and receive 9 enemas after an emergency appendectomy, I went from an enema hater to an enema lover. As a result I craved enemas. Every few weeks, about 3 times a month, I'd convince my mother I was constipated by spending long periods in the bathroom and telling her that I had been unable to go or only expelled small pieces, which usually resulted in me receiving what I desired, a soapsuds enema followed by a rinse enema.
However there were occasions when she said you've only had the problem a day or two which is a short time so if it continues for another couple of days I'll take care of it for you. Top speed the process along the next day I'd take a 2-oz bulb syringe, which was actually a monolithic ear syringe and inject three to five bulbs of air into myself, then "pass gas" several times in the vicinity of my mother. She'd tell me to go to the toilet and try to go again so I go in and again inject another three to five bulbs of air and go out and tell that I only was able to pass gas and resume "passing gas" in her vicinity. It wouldn't take long until she would call be to the bathroom and there would be a warm soapy enema waiting for me.
Most of the time I would still have some air inside of me so it wouldn't take much enema for cramping to begin, though I'd struggle to try to take half the bag, usually after the first cramp complaint she's slow the flow way down, and when I could see the bag was about half empty, I'd complain enough that she'd stop and let me go to the toilet, as I did she'd mention that we'd need to start over and refill the bag. I could usually use the cramping to have the bag refilled a third time, then would come the rinse.