Over time, a man’s penis shrink and become smaller due to repeated compressive forces from coitus. The effects might be minuscule, perhaps even imperceptible to the naked eye, but to imply that the volume of the penis is exactly the same after many years of repeated inward compression by the vaginal walls is simply absurd. The same would be true for any other part of the human body, earlobes for example. It’s sad that asserting these factual claims has become controversial in our increasingly mansplained society. Think for yourself. Think about it purely logically, from the standpoint of physics.