I know, I know :\
I mean...I inherited my stubbornness from both my parents so xD;
He just doesn't know what to do with time off.
He says he'll eat and sleep and not get anything done and my mom and I have both told him "You're supposed to sleep uB<"
My grandpa was similar. He couldn't stand being off and just relaxing, so he'd find anything he could to keep him busy.
Working on the lawn, fixing stuff around the house - anything small too as long as it was work.
He was working even after finding out he had cancer.
He had to leave when his health got too bad :\