How to make Django ManyToMany relationships explicit on the receiving model's end

Question

Relationships, particularly ManyToMany, in Django have always bothered me somewhat. In particular, since the relationship is only defined in one of the models,

Answer 1

Found a way on Django's forum (lost link, sorry)

class Topping(models.Model):
    explicit_pizza_set = models.ManyToManyField(Pizza, through=Pizza.toppings.through, blank=True)

class Pizza(models.Model):
    toppings = models.ManyToManyField(Topping)