Hardest to hold in

Definitely the m and m enema. Growing up I was given it by a bulb syringe as were my sisters. At first it was four ounces later six and, by our teens eight ounces. We had to retain it for thirty minutes. The enema was warm and the first twenty minutes were not difficult to retain it. The final ten were increasingly harder and everyone heard the rumbling in our colon as it filled with gas. As soon as we were allowed to straddle the toilet facing the wall and mom deflated the balloon inside our anus our enema would explode finally bringing releaf as we gushed uncontrollably while mom prepared the soapy enema to clean out what remained in our rectum and colon of the m and m once we stopped expelling it.