I have a boatload of ideas, but I'll be damned if I'm giving them all to the Baron.
So, here's one of my horrible throwaways that needs some serious work:
A retired porn actor and ufologist with an enlarged prostrate discovers an alien and probes it. He finds a analagous gland, and with the help of his good friend and mad doctor, tests its effectiveness as a transplant in human subjects. It turns out that the gland not only salvages but drastically increases semen production in humans (and has another nonhuman function). The mad doctor clones the alien cells, sells them to Ron Jeremy for use in the porn industry, and the rest of the story writes itself.