what does turnabout is fair play mean?
: You cook dinner tonight, I cooked last night. Turnabout is fair play.: (from Cambridge International Dictionary of Idioms) Here's what one reference says: TURNABOUT IS FAIR PLAY - We should do this by turns; each of us should have some time in this good or bad situation. 'Turnabout' is an old noun meaning for two people to do something alternately or by turns, and the saying dates at least to 1755, when it appeared in 'The Life of Capt. Dudley Bradstreet.'