I haven't found any of the lewd potions so far. It could use some hints, even if it's just the name of the potions.
Thanks for the feedback! Mistress Mortiana doesn't give away her secrets easily, but I've just uploaded a new build to help you out.
Check the Grimoire now - all locked 'Lewd Records' now display the required ingredients in their tooltips. You’ll still need to figure out what the resulting effect is, but at least you have the formulas to start experimenting.
Good luck, apprentice. Don't blow up the lab!