It’s not so much because I am particularly funny myself (although I am that too). It’s not so much that I am the butt of my own jokes (although I can laugh at myself too). What I do is keep bits and bobs tucked away. I have trained myself to call them forth at will when they are most needed.
In recent rotation:
“This is a tortilla.”
“Short arms.”
“Croissant pamplemousse je m’appelle bonjour!”
I do not think these alone will make anyone else laugh. And to explain the joke would be to ruin it, as these things go.
But trust. If I have laughed once (which I have), I will laugh again.