Researchers at Kenyon College analyzed dozens of Halloween costumes, Valentine’s Day cards and action figures targeted at either girls or boys. Almost 90 percent of the female characters in these pieces of pop culture were adorned with what the researchers called “decorative clothing” — clothing that impedes movement. In contrast, nearly 80 percent of male characters wore functional clothing that encouraged free movement. A Spider-Man suit lets you run and play without worrying about exposing your body or tearing your costume. A crinoline-boosted princess gown requires you to sit like a lady, manage to avoid tripping on your skirts, and keep your head upright, lest you lose your tiara.