The Boy Is Obsessed With Superman

This is what the Boy has been wearing for a solid week, now. Not straight... he has two Superman tops, and I've been alternating them and doing a special superhero load of laundry each night.

He's obsessed. He won't wear anything that doesn't have a superhero on it.

He has Spiderman boots, Spiderman jammies, Spiderman socks, Batman underwear and toothbrush, and he knows the Spiderman theme song.

Is this normal, or does it mean he has an addictive personality? (I don't know where he would have gotten that from... excuse me while I check ebay.)