Wow - I do the balls of bread thing too, although it's been a while. White bread is something I can't keep in the house without eating TOO MANY pieces, squished into balls.
I have a vague memory of seeing a short film years and years ago, the main character was a lonely guy living in an apartment and I remember he did that with some bread. It's the only thing I remember about the film but that little scene stuck with me.
The other thing isn't really weird so much as a stupid habit - when I take a milk container out of the fridge I shake it up before I pour any. Every. Single. Time. Doesn't matter if it's skim milk, with no fat. Or the fact that all grocery store milk I've purchased, ever, is homogenized. I shake it up, in case the cream separated !