Freedom of choice. When you put gas in a vehicle do you use 87, 89 or 91 Octane? Some people also fill up on electricity so we can include that choice too. Or how about when you put on a pair of pants are you a left leg first or right leg first kinda person. Heck, you might even lay the pair on ground, step both feet in and yank that waist band up doing both legs at the same time!