That oaf of a teacher, Hagrid, was taking them to the forest for 'something special' as he had said, 'a real treat'.
Nothing in Draco's mind was more special, more of a treat than his apple.
As he walked into the forest his emotions came over him. He pulled out his apple, holding it close to him he breathed in the wonderful bitter-sweet smell. The aroma was encasing him like a cocoon. Then Draco, making sure no one was looking, licked the apple feeling and aroused he pinched the stem off of it too.
He looked at his apple in wonder. He realized that there was so much more, it was deep down in the core of him, he knows it now.
Draco looked lovingly at his apple and knew that he was ready.
So ready to go.