PR made him do it!
Viggo and Elena Anaya at the world premier of Alatriste in Madrid.
While it's a little tacky to check out your co-star's rack on the red carpet, I suppose you need to do stuff like that so no one will suspect that you're pining for your boy toy.
/sarcasm
ETA: I really hope anyone reading this realizes that I am mocking the type of comments I find utterly ridiculous at best, and downright offensive at worst, when they're said seriously. I shouldn't have to tell you this but you know...it's LJ so really, who knows what people who wander by are going to think.