Sciencebase has a short article on a potential new aphrodisiac. It’s called PT-141, or bremelanotide, or Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH (“PT-141” is the useful search term if you want to hit up PubMed), and it’s a melanocortin agonist that works directly on the brain. It can be delivered as a nasal spray. It works on men, promoting erections, and it also seems to be effective on women, increasing sexual appetite.