it molds after a certain amount of time. if it doesnt mold but still gets wet...it can break down molecularly in the rock under the paper and become chalk.
Then the ear gets wet...
It gets disappeared when if it gets wet.
it gets dry
No. In fact the drywall will be ruined and need to be replaced. It will not be structurally sound and will attract mold. Certain types of drywall are more resistant to water and are used in areas that might get wet such as a kitchen or bathroom. But even then, it would need to be replaced in the scenario presented in the question.
it gets wet
He gets wet
it disolves
it gets wet
It gets rusty and smells funny.
It changes color and
It gets wet
It spawns.