From Osho's love, freedom, aloneness: The Koan of Relationships

Grace lay on the psychiatrist's couch.
"Close your eyes and relax," said the shrink, "and I will try an experiment."
He took a leather key case from his pocket, flipped it open and shook the keys. "what did that sound remind you of?" he asked.
"Sex," she whispered.
Then he closed his key case and touched it to the girl's upturned palm. Her body stiffened.
"And that?" asked the psychiatrist.
"Sex," Grace murmured nervously.
"Now open your eyes," instructed the doctor, "and tell me why what I did was sexually evocative to you."
Hesitantly, her eyelides flickered open. Grace saw the key case in the psychiatrist's hand and blushed scarlet.
"Well-- er -- to begin with," she stammered, "I thought that first sound was your zipper opening..."

Your mind is constantly projecting-- projecting itself. Your mind is constantly interfering with reality, giving it a color, shape, and form that are not its own. Your mind never allows you to see that which is; it allows you to see only that which it wants to see.