Thats what I thought, and thats why I'm not to bothered, but just thought I should check and make sure I wasn't doing something wrong, he loves to be able to communicate with you, and I think this just one of his ways of saying hi, hopefully he will grow out of it when he matures in about 10 or 15 years (can't see him getting mature and sensible for a long time)
Bilbo and Paddy are play buddies and they will wrestle for hours, they love to play chase in the garden and Paddy loves to hide behind the shed and jump out on Bilbo, you could watch them for ages and the havoc they can cause has to be seen to be believed