The Goblin girl gave me a pickaxe to mine some stone to her, which at last I just only got a bowljob (brilliant!), BUT nothing with the recipe of the body lotion. TAT
It is necessary to go to the slime cave, it is located further than the witch's house. The path continues there and you will find the entrance to the cave. There, on the second level, you will find a green slime girl, give yourself to her