Plus, to separate the urinary from the reproductive system, your urethra would have to "rip" through your prostate, which would itself proceed to squeeze between your bladder and rectum and pull your testicles over your pubic symphysis (that rigid front of your pelvis) so that they could morph into the uterus and ovaries at the top. Then, just when you think it's over... RIP! Right through your corpus spongiosum! As Bane would say, "It would be... extremely painful."
Impressive... most impressive. This is quite an advanced piece compared to some of the other animated sequences (which are good in their own right). You seem to have quite a good grasp of fluid animation - I'd say you have a promising potential future as an animator if you so chose to pursue such a career path.
Very nice! You have a really good grasp of anatomy, both male and female, your proportions are right on the money, and you have a good grasp of expressions, the look on his/her face while the changes are taking place is priceless!