Actresses Laura Harring and Naomi Watts in a scene from the movie Mulholland Drive.[Agencies]

Naomi Watts finds sex scenes with women easier than with men.

The actress - who famously locked lips with actress Laura Harring in 2001 film Mulholland Drive - admits starring in raunchy scenes with female co-stars is less scary than getting intimate with a man.

"The easiest sex scene I have done was in Mulholland Drive because it was with another woman,'' she said.

"There was no awkwardness. There was no sexual tension."

Naomi - who is renowned for her unique sense of style - also revealed she often returns clothes after she has worn them.

"I keep the tags on for the first wear and then decide if I want to keep it," she said.

The 39-year-old actress recently revealed she is "terrified" of working with boyfriend Liev Schreiber again.

"We acted together in The Painted Veil in 2006, and we are looking for more things we can do together.

"It's terrifying though, because he's so, so good. We talk about all sorts of possible projects, then we laugh and say, 'Thank God no-one was around to hear that."'