Remembering When Is A Cakewalk

(My brother occasionally buys personal-size cakes for himself. Tonight, he’s talking about celebrating his birthday by eating an entire regular-size cheesecake. I remind him that he recently lost a lot of weight on a good diet, but he counters with:)

Brother: “You know how long it’s been since I’ve had cheesecake?”

(Sounds like a decent rationale; I’m about to shrug it off when I recall something:)

Me: “You had one just like three days ago!”

Brother: *delighted* “You do! You remember the small things. I was just testing you.”