What are love potions?
LOVE POTIONS: Love potions are in liquid form. The love potion is either carried on the person in a small phial or rubbed on the person. The purpose of a love potion can be vast.
When a love potion is made only to be carried instead of rubbed on the skin, it can be considered as some sort of love spell in liquid form.
Love potions that must be rubbed on the skin instead of simply carrying on your body are made as pheromones. Evidently, the target must be near enough to smell it for the effect to take place.
In a more simple term, a love potion is indeed a love spell in liquid form or a pheromone.