'hot-button' originates from the concept of a 'button' that, when pressed, triggers an immediate and strong reaction, akin to pressing a button on a machine.

The term 'hot-button' evolved from the literal use of 'button' in machinery to a metaphorical use in social and political contexts.

Initially, it referred to a literal button that activated a machine, but over time it evolved to describe issues that trigger strong emotional responses.