Not quite sure who the bigger loser is here:
John Mayer for threatening to spill all of
Jennifer Aniston's intimate beans in a tell-all book or
Jennifer Aniston for allowing this fool to dump her twice.
"
John just can't keep his mouth shut," a pal tells
Star, "and he's telling friends that he's thinking of going public with all their juicy secrets."
So just what embarrassing info could
John reveal?