We also see a steep decline in testosterone in dogs. Sure, we could be seeing two unrelated phenomena operating at the same time, but for the moment, we should

We also see a steep decline in testosterone in dogs. Sure, we could be seeing two unrelated phenomena operating at the same time, but for the moment, we should operate under the assumption that the testosterone declines in dogs and men have a common etiology. If we do so, we rule out a ton of prospective causes.