FISH

Why do Catholics swap Big Macs for Filet-O-Fish during Lent? According to Saint Thomas Aquinas, the meat/fish divide boiled down to sex, simplicity, and farts.

While they might be bright red when they hit your dinner plate, crabs and lobsters are usually brown, olive-green or gray when alive and in the wild (at least in the mid-Atlantic U.S.; crustaceans farther south come in a variety of vibrant colors).