Milk to Butter Superstition

If someone is in love, butter will not come out from milk. This is a superstition in the novel, Tess of the D’urbervilles, written by Thomas Hardy.

Milk was churned to get butter. Mrs. Crick, the dairyman’s wife felt that the reason for the milk not turning to butter was someone in the house was in love. Tess went out and the milk turned to butter. 

Household Superstitions by Joseph Addison

  Visions and magic spells, can you despise, And laugh at witches, ghosts, and prodigies? Going yesterday to dine with an old acquaintanc...