41. Humans may be advertising themselves more efficiently. But they still have the same small circles of intimacy as ever - Cameron Marlow, research scientist at Facebook The average male Facebook user with 120 friends: Leaves comments on 7 friends’ photos, status updates, or wall Messages or chats with 4 friends The average female Facebook user with 120 friends: Leaves comments on 10 friends’ photos, status updates, or wall Messages or chats with 6 friends The average male Facebook user with 500 friends: Leaves comments on 17 friends’ photos, status updates, or wall Messages or chats with 10 friends The average female Facebook user with 500 friends: Leaves comments on 26 friends’ photos, status updates, or wall Messages or chats with 16 friends