Biology Teacher

What do you do all day, I wonder When you're not teaching me at school You have no ring on your left finger And you always cling to that rule(r) You speak as if we are listening I admit you seem nice enough Do you enjoy your current life Or is it lonely, boring, tough? Although for science you have such a passion You look lonely, at least to me I'm sure you must have a family But do you have family you often see? You talk and talk and talk Do you think that I understand? (My eyes are getting tired But still I move my hand) What do you do at home, I wonder Do you live all alone? No wonder you spend so much time here You have an empty home