What I do is fill my 4 quart bag with water not quite full. Then I take J&J Baby Body wash and squirt some in the bag. I fill myself till I can't hold any more, about 2-1/2 quarts or maybe 3 quarts, stop the flow, expel. I then refill the bag, fill myself again. This time a little more goes in. Usually 3 quarts or just a tad more. I expel that and refill the bag again. This time I try to take the whole bag, just about 4 quarts. Hold for a couple of minutes, expel, drain the bag, refill it to wash the soap out and then go with plain water rinses. I get less soap each time I refill the bag. After a few rinses I then mix some baking soda and fill myself again. This time I take as much as possible, usually close to 4 quarts. I expel and then more refills. By then everything comes out clear and I feel great.
The last filling I try to get as much as possible. 4 quarts plus, my belly get extended and I get a really stiff erection and that is when I masturbate. I feel so good with a full belly,am very hard and enjoy my body well.