The study is small and I’m concerned about which is cause and which is effect but one could conclude that Dr. Joe’s Cure for Everything boosts brain power:
Having lots of sex when you get older boosts brain power, scientists have discovered, with people who have regular sexual relations scoring better on verbal, visual and spatial perception tests.
A team of researchers from the universities of Oxford and Coventry, U.K., carried out a study on 28 men and 45 women aged between 50 and 83. The participants were asked about their sex lives, including how often, on average, they had had intercourse over the last 12 months. Answers included never, monthly and weekly.
They were also asked questions about their general health and lifestyle, and undertook a test that measured their brain function. This test assessed attention, memory, fluency, language and visual and special abilities. For example, for the verbal test they were asked to name as many animals possible in 60 seconds.
The original paper is Frequent Sexual Activity Predicts Specific Cognitive Abilities in Older Adults.