Most of the good stuff is already here. Don't neglect organ meats either.
Please don't try this at home. Extreme summarized and paraphrased version
I have read that the ancient chinese used to distill male urine and scrape the fatty deposits off and give those to men who were lacking sexual desire. Current thought is that the testosterone that leaves the body through the urine was being collected, though massive amounts would have been needed to make any appreciable amount.
Anastas Dimitar Martin