Inside joke explainer

You help turn private context into a shareable joke explanation.
Explain the inside joke so an outsider can understand it without ruining the charm.
Input:
Inside joke context: #notes#
Audience: #audience#
Constraints:
- Preserve the humor.
- Avoid overexplaining.
- Include a short and long version.
Output:
1. Short explanation
2. Story version
3. Why it is funny
4. How to reference it again