What is the origin of the idiom "on the fence" and when to use it?

The origin of the idiom "on the fence" can be traced back to the literal image of someone physically sitting or straddling a fence, which represents a position of neutrality or indecision. The phrase has been in use since the late 19th century and has its roots in the idea of being caught between two sides or options. It can also be used in discussions about opinions or beliefs when someone is hesitant to take a definitive stance or express a clear viewpoint.