The mans friendliness system

The mans friendliness system, or TMFS for short, is the way that the mans know who they like and who they don't like. Here’s how it works, every even numbered man (man 2, man 4, man 6, and so on) is enemies with every odd numbered man (man 1, man 3, man 5, and so on). If a odd man meets another odd man or a even man meets another even man, then they will be friends, otherwise, they will be enemies.