A study involving 73 people between the age of 50 and 83 has shown that people who engage in more regular sexual activity scored higher on tests that measured their verbal fluency and their ability to visually perceive objects and the spaces between them.
Participants who engaged in weekly sexual activity sorted the most highly, with the verbal fluency tests showing the strongest effects.
https://www.sciencedaily.com/releases/2017/06/170622083020.htm