The fact that you are reading this itself, is a proof of man's immense curiosity in things. Or, in another perspective, to listen to nobody else but himself/herself.
Leave an apple in the fruit seller's basket, extolling all the greatness of a healthy fruit. A few people come by to have a look and a peck.
Take the same apple to the top of the highest building, encase it in glass and keep it in view,yet away from the touch of humanity. That's when you will have millions of people gazing at it, discussing about its owner, plotting to steal it and even conducting talk shows about its prospective taste.
As somebody said, there is nothing tastier than a forbidden fruit..