The shrunken brain

I always wondered why I couldn't comprehend algebra and now I finally know why. It's all my wife's fault. A recent study at Princeton suggests that sex makes the brain grow. Considering how little sex most men have after fifty its no wonder our brains shrink and we get C.R.S. (can't remember shit). I planned on adding this argument to my repertoire of excuses why we should stay sexually active. Unfortunately I keep forgetting to bring it up. As a result that shrunken brain has lead to other things shrinking.