Craving satisfied

The last few days I’ve really fancied an iced bun. To my knowledge I’ve eaten less than 10 to date in my whole life so no idea why I wanted one. No I’m not pregnant! We were in various cafes and tearooms recently and no iced buns to be had. So a quick addition to this mornings Ocado order and I’m satisfied.
ETA apparently it’s my “birthday”, I’m 500 today so maybe these are my cake! Thank you for all of you pointing it out, I had no idea, and I’m touched :-)
Question, how do you know?