Where Does She Learn These Things?

It had been a while since I had put Anna's hair into pony tails, so about a few weeks ago when I bought new rubber bands, I put Anna's hair into piggie tails... and I have no idea where she learned this!... but I decided to try to make her just a LEEEEEEETLE bit vain so she would leave the piggie tails in lol. So I told her she looked pretty and asked if she wanted to see herself in the mirror. She said, "Yeah," so I took her into her bathroom, stood her on the counter, and showed her her reflection. You could tell immediately that she thought she was pretty adorable. Then she licked her finger, touched her reflection and made a "Sssssssss" sound... you know, like when people lick their finger, make a sizzling sssssssssss sound and touch their bottom or something? and I have no idea where she learned it, but it's probably the most hilarious, adorable thing in the world! And she does it every time I show her her reflection lol. She is quite the character, let me tell you.