As we age, if we remain extremely fit with very low body fat, the face begins to look slightly gaunt, so the shadows become more prominent, especially when smiling, giving some people an older look. This is part of what's going on here. Plus, it looks like he has enjoyed the sun, perhaps a bit too much. But regardless of these things, he's still a gorgeous man who is no longer in his twenties. In fact, in two years, he'll be 40. Personally, I'd think he was gorgeous even if he WERE in his twenties.