也是一只自由泳的小鸟
in these classes that I was told that a minority of the human population being gay was potentially adaptive for ancestral tribes because these individuals could help support the overall community without spending energy on their own children. [...] like women who have passed menopause or people who could never bear children. [...] I have come to think of such ideas as deeply problematic, and at least partially incorrect. This is because it seems so obvious that these evolutionary arguments center heterosexuality.
Not long after this, bi, or two, started to be used to refer to people who had both homosexual and heterosexual desires. A way that bisexual researchers often talk about this is that the bi in bisexual means two, but the two are not men and women, they are same and other.
如果把 bi 解释成包含 hetero（another）和 homo（same）的话，那 heterosexual 不就是会被各种不同性别的人吸引的人？那这个范围比我们平时认知的异性恋要广很多了。。
@unagi 其實基本等同於pansexuality, 不過bi 更有年頭，很多人習慣用bi（也有不想因為說pan 被開玩笑
