涅磐的polly是不是有点歧视同性恋

Answer 1

不是。
Polly，据涅磐的传记《Come As You Are》说，是写的一起QJ案。
According to Michael Azerrad's 1993 Nirvana biography Come as You Are, "Polly" is based on the true story of a female rape victim from Tacoma, Washington. The girl, 14, was abducted in 1987 while returning from a punk rock show, and was raped and tortured with a blowtorch by her abductor. Cobain's only narrative flourish is that the victim manages to escape by flirting with her captor, convincing him to let her go.

In the liner notes to Nirvana's 1992 compilation Incesticide, Cobain expressed disdain for an incident which occurred after the song's release on Nevermind. "Last year, a girl was raped by two wastes of sperm and eggs while they sang the lyrics to our song 'Polly,'" he wrote. "I have a hard time carrying on knowing there are plankton like that in our audience."

Cobain narrates the song from the rapist's point of view
上面大概就是说这首歌是根据1997年一个14岁少女在看完演唱会之后被挟 持然后Q J的真实故事写的，Kurt是从Q J犯的角度去写的。

参考资料：http://en.wikipedia.org/wiki/Polly_%28song%29