You choose to become a anthromorphic wolf. The doctor injects you with a needle and leaves the room. A few minutes later the change begins.
First gray furs starts up your arms ans starts spreading throughout your entire body. Then your face starts to push out into a muzzle and your nose becomes black and wet. Next your teeth change into razor sharp fangs. Finally your hands and feet become anthromorphic paws, and then your manhood grows to 12 inches and retracts back into sheeth and with that final change your transformation is complete.