"I try not to plan it out," the True Blood star, 33, told PEOPLE on Saturday at the Tribeca Film Festival premiere of his new movie Metropia in New York. "It has a tendency to get a little stiff and contrived if you work on it too hard. So, I try to be spontaneous."
But surely a girl will appreciate going to a big event like, say, the Coachella music festival?
"It's not about what you do, but who you do it with – that's most important," says Skarsgard, who has been linked with his Straw Dogs costar Kate Bosworth. "If you are with someone who is awesome and having a good time, you can sit at a bus station and still have fun."
Not only is Skarsgard spontaneous, he's also comfortable in his own skin – a good thing, considering the amount of nudity on True Blood. The actor says he doesn't mind removing his clothes, despite being teased about it occasionally by his five brothers and one sister.
"I'm not a prude at all," he says. "I shot a very, very graphic scene two days ago with a man. I am from Sweden, and it's different there. If it makes sense, I'll just do it. And to me, so far, it's made sense every single time I've got naked or made out on the show."
One of Skarsgard's favorite activities when he's not on the set? Following the Hammarby soccer team from Stockholm, Sweden, where he grew up. "They are not very good but that's my passion," he says. "I try to go home a couple of times and go see them play ... It's a big thing for me."