Why do we present dust bunnies to children as cute?
Here are some facts for you:
The average person sheds about 1.5 million skin cells per hour and perspires one quart every day even while doing nothing, says Tierno. The skin cells accumulate in our pillows and mattresses and dust mites grow and settle.
If that’s not gross enough for you, Tierno explains that a mattress doubles in weight every 10 years because of the accumulation of human hair, bodily secretions, animal hair and dander, fungal mold and spores, bacteria, chemicals, dust, lint, fibers, dust mites, insect parts, and a variety of particulates, including dust mite feces. After five years, 10% of the weight of a pillow is dust mites. This is what you’re inhaling while you sleep. (source)
I doubt the quart of perspiration a day accounts for the notion that the rate at which I sweat must increase as I manipulate my ever heavier mattress.