The word “esposas” in Spanish language has two meanings: one is the plural from “wife” (Spanish: esposa), another is “handcuffs”. Is it a joke? No, etymology of both words is the same. “Spondere” in Latin means “to bind”. And that’s what marriage is about: binding two people together. That is also what handcuffs do. They bind two hands together.
Top photo: Handcuffed prisoner (Photo credit: Rainerzufall1234 / CC BY-SA 4.0)