These are my concerns, in complete honesty.
Before I discuss my concerns, I must concede a few points, else I will be untrue to myself presently and my true views would be improperly left at the reader's discretion.
I believe in the individual's right to an autonomous mind. Everyone has the right to agree, disagree, or to assert their own as part of their rights as a human. Everyone has their own right within their minds to think what they wish—I know I have at least some people on the forum who don't like me, and though I may be adding more with this post, and I wish you could all agree, I know that won't happen, and it is healthy to disagree sometimes, and perhaps excercising it in response to this what is good for you. Everyone thinks and feels differently.
With that, even if by some's definition, transloveualism is a paraphilia, mental disorder, etc., they are still people entitled to an autonomous mind.
Okay here we go:
Suppose you are a man or a woman with a fully functional body in every way, and then suppose that one day, you want to be the other love for whatever reason. In order to do so, you then have to subject your body to hormone levels that are unsuited to your genetic make-up, and could even be unsafe. You might even go as far as surgically removing parts, and transplanting new ones in. Your body may or may not accept them. Your skeletal system may not be built for it. It's a lot of stress to put on a body not suited for it.
It is a level of ungratefulness of their own body that concerns me.
It is the extent of stress that one would subject their body to for an end that may or may not satisfy them that disturbs me.
It is the mindset that one can do anything to their body, and if further entitled, to others' bodies, without foreseen or unforeseen consequence that worries me the most—and I am not referring to just transloveualism. If today's definition of "keeping an open mind" means embracing any and all change and driving headlong into tomorrow with reckless abandon, then it lacks sensibility, and I want no part in it. I am no nay-sayer for change, because embracing some level of change is healthy for creating a better social atmosphere. However, I believe that with some issues of consequence that have strong bearings on the future, one should tread lightly.