Harry Potter looked at the cello. The f-holes looked very enticing to him: tight, but he could manage. Gently, he pushed his dick into the cello. Thrusting back and forth, he let the wood rub against his massively erect penis as the cello's tight hole caressed his huge hard-on. The cello began to play itself in beautiful harmony with Harry Potter A's moans as they had sex. Finally he ejaculated, and the white fluid splashed into the instrument as Harry Potter moaned, "Whoa...you like that, don't you, you stupid cello?" His semen hit the back board with soft thumps and rolled down all the way to the base of the cello, pooling around that little metal thing that sticks out the cello's round bottom and looks, itself, a little bit like a dick.