It's hard to put my finger on. Maybe it's because he's been growing stubble, wearing a lot of sleeveless shirts and hats, I don't know, dressing more "hip." Whatever it is, he's been looking lightly more attractive over the past few episodes in comparison to when he first came in the house.
That's not to say that he's a Matt Bomer male-bomb shell, but Idk, I wouldn't turn him down