You are not a cowboy.

I started singing Old McDonald to Fawn today.  It's one of his very favorite songs as he's into all things "farm".  He usually joins in and loves the responsibility of picking which animal sound we make next.  He also loves to stick with one animal for multiple verses ("cow again" "cow again" "cow again").  Today, instead of the usual joy, my singing was greeted with "no sing mommy, you are not a cowboy."  Okay.  Apparently only cowboys are allowed to sing Old McDonald.  Good to know.