You only change your sheets every couple of months??
I had a conversation at work this week with a few of my friends about how often we change out bedding. I and several of my friends say they should be changed once a week, once every two weeks at least. But a couple of my younger friends (I'm talking 28, so not teenagers!) said they change theirs every couple of months to every four or five months. Ditto their towels because "they are clean when they get out of the shower".
Bleah. How often to wash your sheets and towels?