So I did the marshmallow thing again last night, only with the giant ones (didn't have regular). Froze, but 'em in half, and pushed 'em up. By the fourth half, I was feeling full, but managed to push the last two halves up afterwards, just had to really push.
I was cramping almost immediately, and I was trying to still get my butt to close and settle down. I had a towel laid out on the floor (just in case) and laid down. I wanted to get my body used to the idea of going while laying down. Not ten minutes later (after a lot of sticky, bubbly, wet, and cold farts) I was relaxed and let my bowels do its thing. They filled up my diaper really quick and if felt pretty good. But then my bowels kept going and pushed out a poop! And then another one! I know it was two different ones from how they felt. Totally unexpected, but nice.
Well, I had to do the clean up quick before my roommate got home, only to notice this morning that he never returned. I could have enjoyed it so much longer! Damnit! I'm curios now to try the other substitutions, but I gotta make sure the roomie will be gone the whole night.