On love triangles and technology

In the good old days, there were machines to help you signal your jealousy, especially when your man-of-steel made out with other women in front of you.

But then, sometimes you realised that your competition had far superior technology which she was using to cut you out of the game.

Undeterred, you could always turn to your trusty time-travel machine to set things the way they should be.

Ah, for the good old days.