Of the Human Love in Winter 论人类的发情之冬

人类是目前人类所知唯一没有发情期的动物——不是不发情，而是一年四季都发情。而冬天：
一、寒冷令人感到格外寂寞；
二、穿着更多，有更大打扮空间；
三、有雪等浪漫因素，圣诞节－新年，乃至情人节的良好时段；
四、白天时间短暂，有更多时间进行夜生活；
五、运动时不至于大汗淋漓。
于是，大多数动物的春秋就变成了人类的冬天。


The human race is the only race that estrous period not exists known by the human race. It's not "not exists" but exists everytime. And winter, which:
1. is so cold that makes man feels lonely;
2. makes man dressing more, more fashion, more fantastic space;
3. has romantic elements such as snow, romantic time as Christmas - new year, then St. Valentine's Day;
4. has a short daylight time, more time could be used for night life;
5. makes man sweating less when doing sport.
So, the human race has changed the majority animals' spring or autumn into its winter.