Because humans aren’t perfect and children can’t possibly know what they haven’t been taught, it is entirely plausible that even the best kids are unknowing contributors to the bullying problem at large. THIS is the secret spot where the solution lives.
Boys are not exempt from household chores! In fact, I have learned they like to be helpful in the home when given the opportunity. The key is consistency in having a plan, providing them with explicit instruction, and modeling how you want things done first.