OK, so going into the bio-mechanics of this, that's one underneath each hand and each foot, can you steer the fifth with your teeth?
Motorbikes are like shoes. Nobody has just one pair (that I'm aware of). Like shoes, some are sporty; some are comfy; some look expensive and some are simple but practical. You wear what is appropriate for the occasion, company or activity. My favourite shoe? my motorbike boots!