I think the bf should just learn to embrace the yakkiness. Especially coming from a supervisor. That is PRIME suckup time and could totally benefit him in the long run.

I agree with this, honestly.  If he really likes the job then he should consider this part of the job and even a perk, even if it's a huge pain and he doesn't get to unwind it might help him a ton in the long run to put up with it.