When a tourist approached the bars of the orangutan cage at a zoo in the Philippines to get a closer look, he didn't expect to lose his shirt.

He got more than he bargained for when the clever animal made a grab for his clothing, tugged it off his back and eventually worked out how to put the T-shirt on himself.

In a hilarious clip posted on YouTube, the tourist is seen involved in a desperate tug of war with the orangutan, called Carlo, as he tries to maintain his dignity and stay fully clothed.