人类的祖先——类人猿原是攀树栖生的,为了减轻体重,方便行动,有了尿粪就随时随地排泄。后来由于气候变化,从丛林转移到草原生活,因为到处是食肉野兽,随地排泄会成为凶猛动物追踪的线索,类人猿又养成了定时大小便的习惯。经过漫长的生物进化过程,现代文明大大发展,但仍然没有完全消除当初对排泄不加控制的痕迹。人类是万物之灵,但人类的婴儿在排泄方面,还比不上某些动物幼仔,婴儿出生后很长一段时间,还是“随时随地”大小便。 Human ancestors - apes was originally climbing the tree habitat, in order to reduce weight, facilitate the action, with the excretion of urine excreted anytime, anywhere. Later, due to climate change, from the jungle to grassland life, because everywhere is a carnivorous beast, excretion will become a clue to the fierce animal tracking, ape and develop a regular toilet habits. After a long process of biological evolution, great progress has been made in modern civilization, but the traces of uncontrolled excretion have not been completely eliminated. Human beings are the spirits of all things, but human beings are less able to excrete certain young animals than babies. Babies are shortly after birth or “anywhere, anytime.”