wow, i think you should also research Melanotan II, a derivative of PT-141...sunless tanning? wow!.....
Originally, the compound Melanotan II that PT-141 was developed from was tested as a sunless tanning agent. Melanotan II did induce tanning, accompanied by sexual arousal and spontaneous erections for male volunteers as unexpected side effects. In clinical studies, PT-141 has been shown to be effective in treating male erectile dysfunction and female sexual dysfunction.