C.R.
Having all of them on both sides can be difficult since it does not leave you with a "good" side but the advantage is that it's all over at once.
My biggest suggestion would be that you keep on top of the pain medications and not let any time lapse between dosages for the first few days.
He may not want to eat much and may feel queasy from any drainage of blood that he may have experienced while extracting them. The first day he might be in bit of a fog and not be interested in much including any food but keep fluids coming probably something not acidic or any soda.
I'd get some jello and some pop sickles for the first day and maybe some bland soup. Might be a good idea to stock up on some favorite movies for some entertainment too.
Though it sticks having it done it will be past him soon.
Best wishes,
C.