Especially after they've mastered two. I had one master farmer that would go to the research table while food was growing, work there until the bin would drop a bit, go coconuting or fishing then back to the research table. He'd leave when the harvest would come in. He was just about to make elder (building, healing and parenting weren't his style) when he got sick and I failed to notice! So really, keep an eye on who learns fast, then set them to a task, let them master it then plop them about. Also - don't forget, ( good kissfest increases parenting skills in men, do it w/ a woman over 50 ) Highlight for hint.