I love Scientific American. > Now, I know what you’re thinking. “But Dr. Bering, how do you account for the fact that testicles are rarely perfectly symmetrica

I love Scientific American. > Now, I know what you’re thinking. “But Dr. Bering, how do you account for the fact that testicles are rarely perfectly symmetrical in their positioning within the same scrotum?” In fact, the temperature regulating function governed by the cremasteric muscle can account even for the most lopsided, one-testicle-above-the-other, waffling asymmetries in testes positioning.