Charlie Hunnam has admitted his mother used to walk around the house naked when he was a child.

The 34-year-old actor insists he's never been afraid of baring his butt on camera because his mum Jane taught him not to be shy of nudity and she would even waltz around their home in the nude.

Speaking to Canada's The Kit, the hunk said: ''[I'm] very comfortable with taking my clothes off for the camera. [Onscreen nakedness] never really bothers me.''

He added: ''I think I grew up in an environment where we weren't particularly shy of nudity. My mum was always walking around in the house naked and I spent a bunch of time with my aunt growing up -- she was sort of like my second mum -- she was walking around the house naked, too.''

Meanwhile, the 'Sons of Anarchy' star admits, although he doesn't smoke it himself, he really likes the smell of marijuana.

He explained: ''I don't want to be misunderstood - I don't smoke marijuana personally.

''I just occasionally walk through a cloud of it, which is common in Los Angeles, and the smell sticks to one's clothing.''

However, that isn't Charlie's only favourite scent as he reveals he also likes to sniff his cat's chest after he's been asleep for a while.

He said: ''This might sound completely weird, but my favourite smell in the world is my cat, George.

''My cat smells so f***ing good. If he's been curled up in a ball for a while and asleep, his little chest just smells so good.''