On stage, we just want to generate hysteria. We don't care about looking cool or posing.

People expect us to be different, but we're not. We're very similar people, and it's because we're so similar and close to each other that we make each other laugh - in fact we make each other laugh more than we make anyone else laugh.

I don't claim that our TV comedies are highbrow in anyway, but I think there's a basis to them, and that's why they're more popular than other TV comedies. There's a basis of truth in them, a gut feeling.

I remember once having to stop performing when I thought an elderly man a few rows back from the front was actually going to die because he was laughing so hard.

It's definitely time to stop. We're getting too old. We both realised that the show wasn't as engaging as it used to be. We were starting to look a bit ridiculous.

It only works because we still amuse each other. After we have been working with other people, it is so refreshing to laugh unreservedly when we are back together again.

There is a lot of rubbish written about toilet humour - people saying it is childish and pretending it is beneath them - but there is no doubting the effectiveness of a really good willy gag.