Schrodinger's Handjob

When you tittyfuck a girl who has a flat chest so its not really a "handjob" but its also not really a "Tittyfuck"

man 1 - "Bro i just got a great tittyfuck from my girlfriend"

man 2 - "bro your gf is super flat are you sure it wasn't just a Schrodinger's Handjob"