That Joke Isn't Funny Anymore

“Why don’t you write something funny?” she said.
“Nothing funny has happened to me recently,” I replied.
“Enough with the doom and gloom, I demand you write something funny.” She was giving me a hard time. I've known her a long time so I let her.
"Something funny like what?" I asked.
"I don't know, just something funny..."
We sat there, nursing our coffees, and both tried to think of something funny.
The Richard Gere and gerbil joke popped into my head but I don't think it's what she meant.