Simplify the following text for a Grade 9 native English-speaking person.
Original: A highly sensitive person ( HSP ) is a person having the innate trait of high psychological sensitivity ( or innate sensitiveness as Carl Jung originally coined it ) .
Simplified: A highly sensitive person ( HSP ) is a person who is very easily affected by things . They are said to have a ` high sensitivity ' ( or innate sensitiveness as Carl Gustav Jung originally called it ) .