Ahhh, the late 50's and early 60's. Usually would start by telling mom I had a belly ache.
She would send me up to my room with instructions to undress and lie down across the bed.
I would lay that way for what seemed like hours waiting and anticipating what was to come.
Finally the door would open and mom would walk in holding a paritally filled bag.
She would have me in a prone position and would kneel between my legs and spread my cheeks until the nozzle could be inserted.
I was usually experiencing an errection before hand and would pull my dick up under my stomach so mom wouldn't see. Don't think it worked.
She would then lay the bag between my legs and start squeezing the bag. This would continue until there was a gurgling sound as air was expelled into my butt.
At this time she would clamp the hose and I had to lie that way until it was time to unload.
The nozzle was removed, and I headed for the toilet.
Mom would usually bring the bag into the bathroom and leave it in the sink.
After I was finished she would examine my discharge and determine if I needed a second treatment.
Ahhhhh, the good old days. . . . . .