Elbow obsession...

Yes, my daughter has been obsessed with elbows (since a few months actually). She needs to scratch somebody's elbow to calm down, to fall asleep, to soothe... I do not need to mention that it gets problematic in winter. But if I don't undress and let her touch my elbow, she would get really upset. To be true, I am not worried about it; I rather laugh and try to treat it as a 'normal' kids' obsession. As far as I know, I am not alone.

Though, I wonder, WHEN this elbow fascination ends...