I feel like Ianto only being gay for Jack's cock goes against what I remember Rusty saying in the Declassified in Greeks Bearing Gifts. If I remember correctly, he felt that the great thing about Torchwood was that their sexuality could be fluid and that he didn't need to be writing coming out stories because he did that 10 years ago, it's been done. Maybe that was just in my cloudy head where things make me happy and RTD doesn't latch onto an idea and go crazy.