This guy spoons

I agree. I also think some ways of holding a pen improve your precision and might improve your handwriting or drawing-fine-detail ability.

It probably replaces random, potentially distracting background noises, with something well known and predictable, thus not as distracting.

Can you focus while listening to music you never heard before?

Just kidding, I read the whole post. Not kidding about the agreement , though.

My wife is nocturnal, and also is currently having severe depression. I think she just prefers to avoid people as much as possible, because of the depression, not that the nocturnal lifestyle has caused the depression.

Something something correlation doesn’t imply causation. I agree.