https://www.medicaldaily.com/research-links-high-sex-drive-high-iq-brainiacs-still-have-less-sex-everyone-else-246164
http://www.gnxp.com/blog/2007/04/intercourse-and-intelligence.php
https://link.springer.com/article/10.1023/A:1016313718644
https://www.cdc.gov/nchs/data/ad/ad384.pdf