This poem is brilliant. I interpreted it to mean the shedding of societal-imposed fear to do what one is naturally inclined to do - and having acheived much more by making the transition. Also, that society's imposed shame subdues humans' inherent vitality.
This poem is of such high caliber, I don't know if I'm just not seeing the meaning but the second stanzas seems a little out of place, all the other stanzas have a definite movement away from society's imposition to one's own initiative. See what I mean?
I understand what's happening in the 2nd stanza - the realization of who someone is after stripping away all the things society shames him into - but perhaps that should be incorporated in a way that makes the whole piece more coherent. Perhaps you can work that in somehow, because the whole poem seems to be about the transition, not about the reaction.
But other than that very small inconsistency, this poem is such a masterpiece.9 out of 10 easily.