Lol!
I freaked too.
I never noticed it before DS & I had 2 before him!! I not once saw or noticed it on the girls, but I've seen it heaps of times on him.
Honestly, it still spins me out!
It freaks me out just thinking about it even though it's normal. When its particularly obvious (some days it's more obvious than others I find), I just stick a hat on!!
Bookmarks