First off, I don't even really like the term ''sex change'', because no matter how much surgery is done to make you look like the opposite sex, you will ALWAYS be the gender you were born as. There is no changing that.

Trying to change your gender is a disgrace to the Creator, as you were born as your gender for a reason. People who say that their soul is misplaced in the wrong body are wrong. Mistakes like that simply no not happen.

And also, what if someone got surgery to change their genitals to those of the opposite gender and convinced someone they wanted to date that they really were that gender? That person would be unknowingly dating someone of the same gender, and that is, IMO, an abomination. Not the fact they are both the same gender, but the fact that one of them thinks they're dating someone of the opposite gender when they're really not. THAT is the abomination.