Choose
You want to get a scooter, so you have one self (oneself) and another self working together to choose. The two tiny yous sit on each of your shoulders, like angel and devil, and argue about which scooter you should choose.
せん
えら
None
Suddenly your selfs both gasp and choose a scooter in front of you that looks like a centaur (せん). The scooter is designed like a human on the top, the bars are its arms, and the bottom with the seat and the wheels are all horse. This centaur scooter is what you choose to ride.