I would just like to jump back to the original question.
I don't think being gay is a choice.
I don't think you should try to change it, any more than a heterosexuals should try to become gay. I do believe you can suppress your heterosexuality and live in a gay relationship, but you wouldn't be happy. You would be lying to yourself and the world around you, and you would be expending lots of energy trying to hide who you really are, energy you could have used for something productive elsewhere. You would also be very likely to fail!
Being heterosexual is not contrary to my moral code, neither is being gay for that matter. As for my religion, I don't have one.
And finally, yes it is possible to deny your sexuality for you moral code or religion, but as noted above, it would be a hard and counterproductive thing to do, not to mention utterly pointless.
As for gay being normal. If normal = majority, then gay is not normal, but neither is being able to run a marathon or having $10.000.000 in your bank account. Personally, I would rather be exceptional than normal.