0-5 scale

Used to describe initiation preference in a sexual situation. A zero is someone who never wants to initiate anything sexual. A five is someone who always wants to initiate. Most people believe they are three's. Typically people on opposite sides of the scale work best together (like a zero and a five, or a two and a four). You can't have two zero's because nothing will happen. And you can't have two fives cause they'll get in each others' ways.