A friend of One Direction's Harry Styles has opened up on some of the antics the singer used to get up to.

The 'Kiss You' star has developed something of a 'cheeky romantic' reputation and it seems he had a bit of an odd sense of humour when he was younger.

Speaking to the Mirror, friend Nick Clough said that Styles once took out his penis and put it up to a car window whilst a friend's mother was inside. He said:

"Harry isn't shy about his body. It's more about the attention and causing a stir than being naked."

The 19-year-old mate said: "We went to one of my mate's 18th birthdays and he came home especially for it. One of the mums came round and he thought it would be funny to get his kn*b out and put it against her car window. No one's offended by it, people are just like, 'Oh Harry!'."