I went to a medical clinic for an electrocardiogram. While the technician was lining up her machine, I told her I have dextrocardia.
"What's that?" she asked.
"It means my heart is on the right side of my chest rather than on the left," I answered. "You should set up your machine to accommodate that."
As she attached the wires, she asked casually,
"Tell me, have you had that for long?"
That is an absolute ROTF laugh!