Standing in Target with my 3-year-old son, I searched for Minnie Mouse underwear. Check any retailer online or in stores and you’ll see: Minnie Mouse and every other female character you can think of is printed exclusively on underpants labeled “girls.” For boy-specific briefs, you’re stuck with Mickey or Pluto. Good luck if you’d like the whole gang: Boy and girl characters — like boy and girl toys, clothes and shoes — do not occupy the same spatial plane. If we believe in equality and