“Valentine’s Day is widely known as a celebration of love, chocolates, and romance—but its history also includes a surprising tradition of sending cards to people you dislike.

The first commercial Valentine’s cards and heart-shaped chocolate boxes date back to the 19th century, when companies began turning the holiday into a profitable business. One of the biggest pioneers was Cadbury, based in Birmingham. In the 1860s, the company introduced beautifully decorated heart-shaped chocolate boxes, which quickly became popular gifts between couples.

At the same time, printed Valentine’s cards became fashionable. Early cards were handmade, but mass production soon made them affordable for ordinary people. While many messages expressed love and admiration, another unusual trend emerged—“vinegar valentines.”

These were insulting cards sent anonymously to people the sender disliked. Instead of romantic poetry, they featured rude jokes, mocking illustrations, and harsh messages. They were often sent to criticize neighbors, co-workers, or rejected admirers.

Historians say these cards became especially popular in both Britain and the United States during the Victorian era. Some people even dreaded receiving Valentine’s mail, fearing embarrassment rather than affection.

Despite this negative tradition, the holiday’s commercial success continued to grow. Chocolate boxes became more elaborate, and Valentine’s cards evolved into the loving messages people exchange today.

Experts say the transformation reflects changing social values. “Valentine’s Day wasn’t always just about love,” one historian explained. “It also revealed humor, rejection, and human emotions in all forms.”