What Am I Riddles

Question: Skinny I am fast,
fat I am slow,
but I'll still delight you from your eyes to your nose.

What am I?

Question: There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?

Question: What goes in the water black and comes out red?

Question: I'm light as a feather, yet the strongest man can't hold me for more than 5 minutes. What am I?

Question: What has a single eye but cannot see?