How do we control Dad's grunting and strange bathroom habits?

My 81-year old father has Alzheimer's. He has developed an annoying habit of grunting and groaning. It is constant and with his hearing being so bad, he is totally unaware that he is doing it. He sounds like he's on his last breath and it is annoying. I've thought about replenishing his cough drop supply, but I wouldn't want him to choke. He is fully capable of feeding himself. What do you suggest? Also, he also has developed an art of going to the bathroom and instead of putting the toilet paper in the commode, he puts it in the trash can. My mother dutifully takes the trash out every time he does his business. How can we break him of this? I've suggested taking the trash can out of the bathroom, but other times he leaves his used toilet paper on the sink. This same man shaves several times a day, mows the lawn for hours as the leaves continue to fall, but getting him in the shower once a week is a chore. Any help is appreciated. I've printed lots of tips from this website, but I didn't see anything about grunting noises or strange bathroom habits.