2. Please explain what human centipede merit is.
I'm curious about that myself. I know for a fact that the merit arse licking has always been more or less evenly distributed, at least among the invited participants of the merit orgies; I don't know why The-One thinks it's a strictly linear hierarchy. 
Some of us Merit cyclers are very attractive human beings. I certainly wouldnt want my face sown up to cryptohunters or Thules ugly fat ass, would you?
Merit cycling orgies are a very strict, on invitation only gathering.