But there I am, a proud bisexual since I was 11 years old, assuming he's gay - when he's not out as anything! It's not a secret that he's in a same-sex relationship (he thanked his partner in his Emmy acceptance speech in 2010), but he's not explicitly said what his sexual orientation is. All we know is that he lives with and loves a man. But there I was assuming he's gay!
One relationship is not enough data to assume someone's sexual orientation. As a scientist, and a bisexual, I should know better.