A childhood belief about mirrors

A long time ago my stepfather in response to finding me having a staring contest with my reflection in the mirror told me about a prince (Or a count I can't really remember) who was so obsessed with his reflection, (He wasn't vain, just curious) that eventually he was dragged into the mirror-world....needless to say I still have moments where I stare in the mirror expecting my relection to do something on it's own.