When a male is faced with the question of the average rating (out of 10) of as many females he can see at a certain location or a given time.
The index is calculated = number of females / total score
GM: What's the bird index like down there?
Matt: Ow, its a solid 7.
(meaning the average rating out of 10 of all available females seen at one time is 7)
Фабруар 13, 2012