Behind the Candelabra star Michael Douglas has said that he admires how exposed his co-star Matt Damon allows himself to be in the movie's hot tub scenes.

The 68-year-old actor plays gay pianist Liberace in the film, while Matt plays his partner Scott Thorson, and Michael said he was impressed with how Damon took on the role.

Speaking to The Hollywood Reporter, Douglas said: ''We did have a lot of pages in the hot tub. But Steven is very tasteful, and we have had a couple of sections choreographed so as not to embarrass anyone.

"We just got it on. Look, I so tip my hat to Matt. I know in my prime, I don't know if I could have done what he does here.''

Michael further explained that he chose to feature in the movie because of its emotional depth, adding: ''We knew, with [director] Steven [Soderbergh], this was not going to be about winking at the audience. It was not going to be La Cage aux Folles. This was a relationship between two people who loved each other a lot.

''I swear after a few minutes of watching it, I forget it's Matt and myself, and then I literally forget it's two guys.

''In their arguments in Richard La Gravenese's screenplay, you can hear a married couple having at it.''