Let off some Steem with weekly jokes and riddles

Hello. I am starting a Steemit jokes and riddles section for fun. After a long day at work or a stressful day with the kids, this is the perfect thread to release some steem and have a laugh. I will try to have a few per week for everyone to answer. I'll post the answer a day or two after posting.

First one:

Why did the professional Coffee Maker quit his job?

Another one for you smart people

What can you hear in quiet?

Joke:
An old lady is driving and notices a sign that says seniors night. She gets excited and calls all her friends to meet her there. When all her friends get there they go inside. They look around and feel shocked that there are so many young people at the place meant for seniors only. The young boys kick them out and say this dance is for seniors only. The old lady insists that she is a senior and the young boys point and laugh and point out that they are in a high school. The lady replies, you seniors sure haven't aged much since high school.

Answers: #1 To become a TEAcher
#2 why