COMEDIAN Russel Brand says teenagers are being exposed to 'icebergs of filth' while he describes the 50 Shades of Grey movie as corrupting, cultural smog.

In a YouTube video, already viewed more than 300,000 times, Brand admits that pornography has affected his own ability to relate to women, himself, his own sexuality and spirituality.

The video is part of Fight the New Drug campaign "dedicated to educating and raising awareness on the harmful effects of pornography using only science, facts, and personal accounts''.

"Pornography is not something that I like,'' the former husband of singing sensation Katy Perry admits.

"It's something that I have not been able to make a long term commitment to not look at and it's affected my ability to relate to women, to relate to myself, my own sexuality, my own spirituality.

" Soft cultural smog like 'Fifty Shades of Grey' is making it impossible for us to relate to our own sexuality, our own psychology and our own spirituality, because this powerful primal resource, whenever it's plugged in, it's jarring and distracting," he continued.

"if you're constantly bombarded with great waves of filth. It's really difficult to remain connected to truth," he says. Brand argues that sex should be for procreation and enjoyment - an expression of love.

Instead, he said teenagers were being bombarded by highly sexualised images which changed the way they saw the opposite sex, relationships, and the act of sex itself.

"I was obsessed with porn when I was a teenager and it was nostalgic mad stuff that makes me sound old,'' he says. "We had to find magazine places and steal things from under beds.

"Living in the culture now where there's just icebergs of filth floating through every house on Wi-Fi, it's inconceivable what it must be like to be a young adolescent boy now with this kind of access to porn.

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Russell Brand laments 'icebergs of filth' facing teens