First off, I think asking our sexual orientation is a bit too personal, and totally unnessecary. And hair/eye color is just silly, there aren't going to be differences in results in blue eyed vs. brown eyed people.
Some of us are spatially challenged, and don't collect the stones. I don't know the volume of the stones I flushed out, but I know how many, I counted them. So a question with a stone count would be good.