It's crazy, isn't it, Cookie! I should have known better--he performs when highly motivated.
In Canada, we have an ice cream chain called "Dairy Queen". One day last summer, my dad proposed taking us for ice cream using the international radio alphabet...something like, "Aquinas, shall we go to Delta Quebec?" Literally a second later, DS screams, "yeah, ice creeeeeeeaaamm!" I occasionally use that alphabet when spelling out travel confirmation codes or addresses with merchants, so I guess he picked it up that way?