For instance, my mother's mom will call and drop a hint that her fence needs to be fixed, or that she is having some household problem or other that needs to be taken care of. My mother will just nod her head and tell her "oh, that's terrible. I hope you get it taken care of soon", while my father will volunteer his own time to go and help her. And he doesn't even like her or enjoy doing it. It's just some weird compulsion to be helpful. My mother then proceeds to bitch at him because this takes away time from his work/family/anything else more important in her view, while her mother could have easily paid someone or some service to do the work.