|Robert Pattinson and Kristen Stewart kissing in 'Twilight'|
The 26-year-old actor - who has reconciled with his 'Twilight Saga' co-star Kristen Stewart, 22, following a brief split because she cheated on him - is confused why his lips appear to be a "vacuum" that make a lot of noise when he smooches with someone.
After being shown a clip from new movie 'The Twilight Saga: Breaking Dawn - Part 2', he said: "I just noticed, this is a very clear example of it, every single scene I end up kissing someone ... I have extraordinarily loud little pecks.
"It sounds like I'm walking around in Wellies (Wellington boots ... I don't understand, my lip is literally like a vacuum."
Robert also spoke of his new-found passion for skydiving - joking it is the way he eventually wants to die.
He told TV talk show host Jimmy Kimmel: "I went skydiving in Australia. I felt so relaxed. I loved it. I wanted to do it again immediately afterwards ... That's also how I want to die."
While he enjoyed his time in Australia, the British star admitted he is a "freak" because he doesn't usually like exploring when he has to travel to promote his films.
Asked what he does when he travels, he said: "I'm a freak. I want to stay in my hotel room the whole time."