Selma Blair's prosthetic kiss

Selma Blair enjoyed kissing Ron Perlman's prosthetic face in her new movie. US actors Ronald Perlman (L) and Selma Blair (R) pose during the presentation of the movie 'Hellboy II. The Golden Army' in Mexico City, Mexico, 03 July 2008. EPA/MARIO GUZMAN

US actors Ronald Perlman (L) and Selma Blair (R) pose during the presentation of the movie 'Hellboy II. The Golden Army' in Mexico City, Mexico, 03 July 2008. EPA/MARIO GUZMANThe actress - who plays Liz Sherman in superhero sequel 'Hellboy II: The Golden Army' opposite Ron as the eponymous hero - loved the romantic scenes which saw her locking lips with Ron's plastic and make-up covered face.She said: "The first time I had to do a scene like that with Ron I did not know if I could touch him, if it would ruin the make-up. I had never worked with a prosthetic love interest before. So I did not know how I would touch him, if it would make a sound, if it would sound like a balloon. I had no idea. "But after that it felt completely natural and normal and I completely forgot that I was talking to a man in make-up. It felt completely real. I actually really enjoyed it."Selma also admitted that she founds some scenes more difficult to shoot than her co-stars because she was the only character to "have a face".She explained: "I didn't realise I was the only human until we were halfway through the movie and I was like, 'Wait a minute - I'm the only face here!' "And I'm like, 'Where are you guys looking?' And everyone else says, 'Oh, it doesn't matter - no one can see our eyes?' And I said, 'Oh, my God, everyone can see my eyes, it really matters where I'm looking, what I'm doing, I have a face, I have a face ..." There was a moment of terror, like "Oh my God, I'm going to c**p all over this movie - I'm going to be the mess.' "