I think it's nice that he didn't say he was either gay or bi. A lot of his generation seem to really understand that sexuality - all sexuality - is a sliding grade. Just look at what Josh Hutcherson said recently.
Maybe I could say right now I'm 100 percent straight. But who knows? In a f*cking year, I could meet a guy and be like, 'Whoa, I'm attracted to this person.' I've met guys all the time that I'm like, 'Damn, that's a good-looking guy,' you know? I've never been, like, 'Oh, I want to kiss that guy.' I really love women. But I think defining yourself as 100% anything is kind of near-sighted and close-minded.