Billie Piper on Carson Daly's show Rudey talk is usually the last thing on a new mum's mind.

Unless your name is Billie Piper.

The actress, who gave birth to son Winston three months ago, treated American TV host Carson Daly to some dirty talk to promote Secret Diary Of A Call Girl across the pond.

While guesting on Carson's Last Call show, Billie spoke about her raunchy role: "Playing a prostitute, you have to accept nudity is required. There's not that much boob, more ar*e."

Lovely.

Billie, 26, also had a go at furthering Anglo-American relations by educating Carson on the UK's slang terms for sex:

"Bonk is like s*******, like sex. Cheeky is kind of cute and seductive, but not trashy, not seedy."

Useful stuff to know.

She went on: "There is one called 'sploshing'. What do you think that is...? It's basically making love to food. It's not like dipping sauce and condiments. You pay your standard rate and you get that."

Anyone else a little confused?