Gav Thorpe is a knuckle head. There really isn't any indication to bring up such a topic. I much happier thinking that their sexuality is on the same level as human being. Some straight, some gay, some bi, I don't give two shits. Thats just so weird to bring up, and I'm surprised GW would allow an author to talk about sexual topics in a family store game.
Family game....with a god that's soul purpose is sex drugs and excess. With half nude hermaphrodites and multi breasted demonic creatures.