XXX is

Tell me something nice for the night :)

YYYY

During its life, the pillow absorbs several tons of fluid that evaporates from our skin. The saprophytes, living in the same, 0.3 mm, cause the most severe forms of allergies, and feed on scales with our skin or microparticles of blood, which are on the feathers. The old feather pillow consists of 10% of the feces of ticks.
In 1 g of mattress dust live from 200 to 15 thousand saprophytes, and in a double bed there are 500 million.

YYYY

Have a good dream =)

XXX is

by Gaia! and :-(