What is the origin of the idiom "give someone bunny ears" and when to use it?

The origin of the idiom "give someone bunny ears" is less clear compared to some other idioms. It likely emerged from the practice of making bunny ears with one's fingers and placing them behind someone's head during a photograph. The intent is usually playful or mischievous, and the gesture is used to create a humorous or whimsical effect in the photo. This phrase is not used in formal or serious contexts. It is often used informally, especially when discussing photos, to describe the act of making bunny ears behind someone's head as a prank or joke during photography. It is a light-hearted way to describe a playful action.