What is the origin of the idiom "on the horns of a dilemma" and when to use it?

The idiom "on the horns of a dilemma" originates from the myth of Hercules and the Cretan Bull, depicting a situation where one is faced with two equally difficult choices. It is used to describe circumstances where there is no straightforward solution, and each option presents significant challenges or drawbacks. This idiom finds relevance in various contexts, such as ethical dilemmas, complex decision-making processes, or situations where individuals feel trapped between conflicting alternatives. It is used to emphasize the challenging nature of the decision and the absence of a clear or easy resolution.