What is the origin of the idiom "float one's boat" and when to use it?

The idiom "float one's boat" originated in the mid-20th century, and its exact origin is uncertain. The phrase draws upon the imagery of a boat floating on water, which symbolizes enjoyment, pleasure, and personal satisfaction. It is an informal and figurative expression used to describe something that brings pleasure, satisfaction, or interest to an individual. It signifies personal preferences, tastes, or things that resonate with someone on a subjective level.