You know what's incredibly kiddy? Spiderman. He's a freaking comic book character, what's more kiddy than that? The movies are only making money because little 8-year olds can't get enough of the guy. Any *mature* movie-goer would only watch real movies, like 2 Fast 2 Furious, or Biker Boyz.
Pro wrestling is kiddy. Hell, I grew out of that preschool bullshit when I was twelve. A bunch of well-oiled topless guys pretending to throw each other around a ring? I may as well watch Cirque De Soleil. At least those guys have the excuse of being French. The only real sport is football. American football.
The Beatles were hella kiddy. "We all live in a Yellow Submarine," hurr-hurr. It's like they channeled Barney and Friends from 30 years in the past. You want real music? Techno and industrial. That's it.
And you know who the kiddiest people in the world are? Soldiers. I bet they all break out their G.I. Joe dolls every night and play house. They wear camo to hide their Micky Mouse underwear. Hell, I'm only enlisting because it's required for my naturalization as an Israeli. It's wuss work, sitting around waiting for an IED to fall, guarding protest rallies... seriously, my little sister could do this stuff better than most people who enlist. Real men have real jobs: tech support, UPS deliveryman, or porn star.