Who says its always an either or? For most people like you, its a sliding scale.
You can choose to be homosexual at any point in your life and learn to like it. Also, some are born out of the gate liking it. Its both.
This is called arguing for the sake of arguing. This is typical of how arguments evolve, and hence why arguments rarely ever produce understanding in either participant.
It shows how people otherwise capable of flexible thinking get locked into fixed positions to argue a point.
It also shows that TA is a master troll. Doing a homosexual act obviously doesn't make you a homosexual. Later arguments about being able to like a homosexual act is confusing one concept with the other, failure to see this is only due to the hostility.