Back in the 1800s, in addition to the valentines sent as a profession of love, people would send vinegar valentines, often anonymously, to people they didn't like.

在19世纪，除了作为爱的表白而寄出的情人节卡片外，人们还会寄出“醋情人节”卡片，通常是匿名寄给他们不喜欢的人。