Mom tells me:
"There's a show on now about ADD. You should watch it so we can learn more about your father."
My mom and I have always believed that my dad has a mild case of ADD, since his attention span rivals that of a gnat.
As I was in the middle of watching something else, I let her do the reconnaissance. About every few minutes, I'd get updates:
Mom: Actually, he only has a few of these traits. I'm not so sure he has it after all.
Five minutes later...
Mom [alarmed]: I think I have it.
Note to self: Monitor Mom's TV viewing habits as she's prone to self-diagnosing.