Yoghurt make man go crazy

It's never a nice feeling to have one's idiocy revealed. That feeling of humiliation as you realise just how stupid you've been. I experienced it today when I told my colleague that I have mango with yogurt and oats for breakfast. Hysterical laughing and head shaking ensued, punctuated with "You put mango... ha ha ha... mango... ha ha... with yoghurt?....ha ha ha!" How could I have been so stupid?