I saw a TV show in the late 1990s where they made fire by doing that thing where you rub two sticks together, but instead of just using kindling, they also used some hair. Hair is supposed to be one of the best things to start a fire with if you have no matches or a lighter.
So far, whenever I have seen people on Survivor trying to make fire using sticks, they never seem to use hair, although there is usually someone around who has hair which is long enough that it wouldn't matter if a small bit was cut off. I wonder if the reason it's not used is that most people just don't know about using hair when trying to make a fire from scratch.
Maybe some future cast member of Survivor will read this and try using hair if they are forced to rub sticks together to make fire. Using hair should speed up the process.