Answer:
Though I am dark Adam married me.
I go inside boots and outside shoes.
I am whole but incomplete. I have no eyes yet I see. You can see and see right through me. My largest part is one fourth of what I once was.
I am very afraid of doing scary activities.
I am a cave full of bones and the house of a worm.
I flow from the Homerβs mouth when he sees doughnuts.