You should not single people out for their physical features.
Tom will run a public soccer game for the neighborhood kids today, at a local park.
Tom needs to organize the kids into teams.
Tom puts papers in a hat, with one or two written on each, and every child picks a number at random to be assigned to a team.
Noticing about the same number of boys and girls, Tom tells them to split into two teams with boys on one team and girls on the other.
The kids are assigned at random, so there is less chance of hurt feelings, and Tom feels that he has done a good job promoting team spirit and fun.
Several players tell Tom that it is not nice to pit boys against girls in what should be a fun game and Tom feels guilty, realizing that they’re right.