Every night you tell me what to do, and each morning I do what you told me. But I still don’t escape your scold. What am I?

What loses its head in the morning but gets it back at night?

I sit on your face but I’m not a frown, I help you see when you’re looking down. In water I’m clear, on land I might fog. Strap me on tight, I’m your vision hog!

I mimic your secrets but never tell lies, A jester with feathers and keen, watchful eyes

I buzz in your ear like I’ve got things to say, then steal your blood and dart away. You slap yourself, I fly with glee, guess who just got a bite for free?