Can you sleep with your parrot vs SHOULD you---my first hand perspective
Wrangler had a plucking episode 2 months ago and pullled out most of his body feathers (chest/back/legs). While it is growing back, the cold temps rolled in before he got much of a down coat in so I brought him upstairs where it's warmer at night. He started sneezing so I brought him into bed and settled him on my chest and pulled the sheet over him to help trap his body heat---much like his missing feathers would--until he warmed up. He clearly liked it, I was thrilled that he would snuggle since he's usually a touch-me-not, and so the month of sleeping with me began. I wont give all the details, but Wrangler is now back downstairs in HIS cage, with a K&H heating pad.
Pro's: Great bonding for us, helped him through the grow-in period
Cons: Pissed my husband off. Spoiled the bird--realllly hard to backstep from it once you start. I didnt get much sleep. I couldnt really turn over with him on top of me, and yes once i did roll onto him a bit and got a loud squawk for it. Being constantly aware of where he is ruins a good nights sleep, not to mention the nights he chose to snuggle under my chin like a neck muffler, I overheated. (one night he did too!)
To address your pooping in bed question...only once. If I awakened or rolled over during the night I would always hand him up to his perch on the bedside table. As soon as he pooped he got to come back in. He got pretty good at doing his business within a few seconds. A few nights he held it all night. Having done it--i DONT recommend it at all and am relieved that we are back to having him downstairs. If he comes upstairs again, he'll have a sleeping cage, not a stand--to insure he doesnt join me but Im not planning on bringing him up unless its essential for his health.