"Homosexuality is a choice" and its paradox

[LostLocke]

If homosexuality is a choice, then the implication is that human sexuality is largely plastic and gender identity open to change

Gender identity is open to change.
People have done so physically, and even without an out right sex change, the concept of what is 'masculine' and what is 'feminine' has changed, and IMHO for the better.

As for plastic, it can definitely have some "interesting" uses in sexual....
...oh, that's not what you meant.
Never mind then....