What does this button do?

Being a virgin he thought the best way to proceed was to concentrate on lots of foreplay. He’d never seen a real woman’s body live and in the flesh before let alone touch one. Everything he was doing he was doing for the first time, he was watching and listening to her, trying to gauge what kind of reaction each part he touched produced. He wanted to make sure he got it right.

So far he had touched, with his hands or lips, her earlobes, her neck, her cheeks, her breasts and her nipples. He was working his way down her stomach, spotting her navel he had to suppress a giggle when he thought to himself “Ooh, what does this button do?”

He traced around her navel with his finger tip; that got a good reaction. He decided to run his finger tip over the centre of her belly button. As his finger swiped over her navel it flashed blue for a second then her arse fell off.