Answer:
I help boats park
I cause involuntary movements in your vehicle
I have a strong affection for belly buttons.
I stay where I am when I go off. What am I?
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?