This medieval fish spell serves to bind a woman, keeping her entranced by the relationship.
Do you fear your lover will leave you? The answer is simple, cook a whole fish in donkey's milk. Strain, reserving the liquid, because that's what you need for the spell. What you do with the cooked fish is irrelevant. Let the liquid cool to room temperature, or a little above. While the woman is sleeping, gently bathe her vaginal area with some of the cooking liquid.
From: Encyclopedia of 5000 Spells