The Attraction of Secrets

Why is it so hard to keep them?

1) Why is it that when someone says to us "Don't tell anyone" you can be fairly sure that nine times out of ten we will let the cat out of the bag?

2) Who would you talk to if you wanted to tell your secrets to someone or would you rather write them in a private diary or simply keep them to yourself?

Who is speaking?
What is the context?