The current theory with regard to the phenomenon of transsexuality posits that a person's sexual orientation & their gender identity are fixed at different times in the gestation process. This is why a person who is genetically male can feel themselves to be female or vice versa & why, either way, they can find themselves attracted to either members of the same sex or of the opposite sex. As an example, a genetic male may believe that he "should have been born" female. But this has no direct bearing on his sexual orientation. He could be sexually attracted to females or to males (or both, i.e. bisexual.) Sexual orientation & gender identity are 2 separate variables.

It is for this reason, also, that a person could be born male and feel like a genetic male, but be sexually oriented toward males as well. In some cases, a male with this gender identity / sexual orientation profile (which we would typically refer to as gay or homosexual) may be comfortable with this sexual orientation In other cases, a person may not be comfortable with this sexual orientation and so the person may find it difficult to accept. This may be a function of both gestation and upbringing.

The point here is that all of this is a function of gestation. It has nothing to do with "God" or strength / weakness of character, etc. Bringing such concepts into the discussion simply muddies an already complicated situation. Therapy is needed in order to reconcile how the person wants his or her sexual orientation to be versus what the gestation process gave him or her.

Ideally it may be possible to imagine that a person can simply choose whether or not abide by the imperative of his or her sexual orientation in the same way one might choose between brands in a store. However, realistically the sex drive in human beings is so strong that for a person to say: yes, I'm sexually attracted to this sex, but I'll just choose to be attracted to the other, or I'll simply choose not be attracted to anyone, is so unrealistic in most cases as to be irrelevant. Yes, there are individuals who are asexual. They have little or no sex drive at all. But this is not a conscious choice. Again it is a condition which has been "installed" into them via the gestation process.