My wife/mommy and I have me trained to where if i am wearing a diaper to bed, I fill it up without waking up. But, if i am not wearing one, i don't poop or pee while sleeping.
Around 10 we get ready for bed and there is a cart next to the bed with supplies for her special baby. First, she puts a towel down and i lay down on it. Depending on her mood, I will either get diapered only, or I will get something inserted in me before the diapering. Even if it's just a diapering only, I still get a rectal thermometer. If I'm running even a 1/10th of a degree temperature, then mommy/wife becomes doctor-mom, which is ironic since she is a real doctor. Next, she grabs a syringe and loads it with liquid acetaminophen. Next its time to remove the 'icky poopie' as she refers to it. Now, I get cleaned out. She will give me anything from 1 or 2 suppositories, to 1 or more bulbs squeezes, a fleet enema, or even a bagful.
I lay there while it does its job inside me, laying across her lap suckling away, usually getting milk, and filling up my diaper. Usually after cleaning me up, I get a couple ex-lax pills before being rediapered before bed.
Come 6 am, its time to change me.