[Aquinasfan]

Nonsense. If an act is opposed to the natural order of the universe, then attempts to perform that act will simply fail.

Are aspects of the body ordered toward specific ends?

Is the hearing system ordered toward hearing? Is the reproductive system ordered toward reproduction?

If not, then is the act of attempting to reproduce with one's ears equivalent to attempting to reproduce with one's reproductive system? Would the former activity be disordered and unnatural?

[jimt]

Are aspects of the body ordered toward specific ends?

They certainly seem to be.

Is the hearing system ordered toward hearing? Is the reproductive system ordered toward reproduction?

Yes and yes.

If not, then is the act of attempting to reproduce with one's ears equivalent to attempting to reproduce with one's reproductive system? Would the former activity be disordered and unnatural?

No and yes.

Disordered, unnatural, yes. Should it be illegal, no. NO ONE'S RIGHTS ARE BEING VIOLATED.