This is interesting! I had to think about it a bit. I probably change my sheets every 4-6 weeks, but it should also be noted that I sleep in my own bed only about half of the time, because I'm on the road so much. I change them a lot more when I'm sick and in bed more often.

I don't fold my underwear, but my panties are stacked neatly in a drawer. They aren't organized by color on purpose, but tend to end up kinda that way because my loads of laundry are by color, so all the white panties end up together and all the pinks/purples/reds and all the blues/greens, etc. Once they get put into my suitcase though, they're not folded at all. Just shoved in.

So, what does this say about me? (other than that I am very obviously a longterm singleton and sleep in hotels 4 nights a week...) I don't know. :)