baby's first birthdays....

I realized somthing yesterday while attending my nephews first birthday. All adults think it's funny and cute to let a baby make a mess out of their cake on their first birthday, but then if they make a mess after that we scold them. What are we teaching them by allowing them to make a mess one day, but scolding them any day after that? I was that only adult not helping him make a mess, infact my fiance thought I needed some icing on my forehead.