According to the World Health Organization (WHO) definition, a drug is any substance that, not being produced by the body, has the property of acting on one or more systems, producing changes in its functioning.
The drugs act especially on the central nervous system, which is responsible for coordinating all body functions and its includes the brain. So acting in the brain, the drugs can affect mental process.
I think it is because the water is condensed in the air and the air is now hot INSIDE the shower, but when you step out the air isnt as condensed as it was in the shower.
