He probably simply smokes too much weed and his sleep schedule is no good. It is a little annoying to hear him sigh and groan and be exhausted all day long when he does not much truly daily but just walks the dog and play video games, read the news and a bit of class prep. 

Tonight, I sneaked onto David's porch and picked up the books and photo of whiskey I had left in enveloppes on his porch which he never ever picked up in a month. I told him about it the other night and they were still there. So I got them back and put them safely where they are appreciated: by me! ah ah! I handed a copy signed of The nutty squirrels in my backyard to him this week end, from my hands to his. I wonder if he can read since he had three strokes he claims? He is a jovial old man in the hood who emanates peace and God's Love.