You get access to the human code,and get one free Git push.What do you change?

Refactor this series of evolutionary hacks:

1) Bug: Warm-bloodedness means that testicles now don't work as well. Reasonable patch: make them more resistant to body heat (this worked for ovaries, apparently). Actual hack patch: hang them on the outside of the body so they can stay cooler, and also add a complicated mechanism to make them get closer or further away as the temperature changes.

2) New bug introduced by 1): Testicles on outside of body are now extremely vulnerable to damage. Reasonable patch: enclose them in some kind of hard cartilage or bone shell. Actual hack patch: make them hurt really bad if they get hit, so their owner takes extreme caution to protect them.

Patch: Gonadotropin exposure no longer causes Thymus atrophy and resulting auto-immunity issues.

Also: Patch: Cartilaginous pads maintain circulatory system connectivity for maintenance purposes.

Make breathing a one-way process with an inlet and an outlet.

Fix the memory leaks

Cluster-B sociopathy/psychopathy (fix the connectome issues)