A blonde, studying to be a counselor, always went into her counseling sessions with an earmuff over one ear. After a while the supervisor became very curious and asked her about it. She replied, "It's for confidentiality."
"Confidentiality?" asked the bewildered supervisor.
"Yes, confidentiality," the blonde explained, "I've been told what goes in one ear comes out the other, and I don't want anyone else knowing what my client says."