Our reward circuits go off when someone mentions taking a rest.
Bee reward circuits go off for things that we would consider work.
Basically, the whole time they are face-first in a flower slurping up nectar and gathering pollen, the thing going through their tiny brains is “Fuck yeah I needed this”.
If you gave a bee the day off the general sentiment would be “What the fuck man, this is bullshit, I demand you let me go and collect nectar right fucking now!”