With a history of drug use, sex addiction, and alcoholism - and winning the Sun's Shagger of the Year award three years running - comedian Russell Brand isn't an obvious keeper. Least of all if you were brought up by Christian pastors listening to gospel music, as singer Katy Perry was.

Still, they say opposites attract. And while Brand has abandoned drugs and alcohol (not sure about the sex addiction), Perry has spurned her Christian upbringing with songs about jacking off and kissing girls.

Despite this, the two of them have been dating since September 2009. I wonder what they talk about before bed: his AA meetings or her lyrics about puking in toilets?