On Being "Against Nature"

From an awesome book I picked up yesterday on homosexuality throughout history:

This kind of argument is ridiculuous because men forget that they are part of nature themselves; if some aberration develops within them it is caused by nature acting within them. I have never been able to understand why intelligent men fail to see how absurd and pretentious it is to mention something which could exist outside nature or in opposition to it, because we can have no knowledge of anything which is not within nature; we are phenomena of nature and an integral part of it... If homosexuality is perverse, then we are forced to find nature itself perverse.

Seems to me that anyone who makes the "against nature" argument doesn't really want to grapple with the dizzying complexity of the world we live in; a pompous explanation for a place that is so much bigger than us. Get over yourself!