El Mordisco! A Chilean birthday tradition

I was surprised when I returned from my trip to San Pedro by my host mother and my neighbor. They presented to me some little gifts and a fresh pineapple and cream cake (delicious!). My neighbor then explained to me the "tradition" of el mordisco, where the birthday-er takes a bite of the cake without hands and is subject to a push from behind such that you face is also involved in taking a bite.

Either way, it was a welcome surprise and very kind of them.