english: In the animal world, if you take rats, who are hardwired to play at a certain period of their juvenile years and you suppress play -- they squeak, they wrestle, they pin each other, that's part of their play.
non_english: U životinjskom svetu, ako uzmete pacove, koji su genetski predodređeni za igru u određenom periodu svog ranog života, i zabranite im igru - oni ciče, rvaju se obaraju jedni druge, to je deo njihove igre.