The British have bad ones, The old use fake, The young have none, You need these if you want to eat a steak! What am I?

It's a happy occasion when I accompany oyster, and a sad occasion when I'm at a school.

I can accentuate your expressions, I can mend two broken hearts, I can hide a confession if you don't know where to start.

I tell time, but I'm not a clock. I keep watch, but not on your wrist. I drink the light to find the hour, but I go blind when the clouds are out.

I’m long and skinny, I twist and I bend, People walk on me from end to end. I’m not a road for cars that zoom fast, I’m where your feet go, first to last. What am I?