Due to the clock sound 'tick-tock' and not 'tock-tick'
Have you ever wondered why do you say "Tick Tock" and "Tic Tick" or "Ding Dong" and "Dong Ding"? Its reproduction, this is the reason that.
The following route was written in the book written by Mark Forsyth. How has to turn these elements of eloquence to the right English phrase.
It is clearly made up of its English rules that we do not know. But it now "Tic Tac Toe" makes complete sense.