Stinger's New Word

We have a problem.  Stinger now has a word for milk.  You wouldn't think that this would be a problem, but the word he has for milk doesn't resemble the word at all.  In fact it starts with a B sound, and has an "ear" sound at the end.  That's right!  My son calls milk... "beer"!  I have no idea where this came from.  We do not buy beer or drink beer as we are a dry hive!  He doesn't even know what beer is!  I have come to the conclusion that it is just a group of sounds that is easy for him to say.   Imagine my horror as I push him down the milk aisle at the grocery store as he yells, "beer, beer, beer!"  Enjoy this video Honey took!