spermologist
A person who gives trivia is commonly referred to as a "trivia host" or "quizmaster." They often lead trivia games or competitions, presenting questions and guiding participants through the event. In casual settings, they might simply be called a "trivia enthusiast" or "trivia player."
a person that studies gems is called a gemologist.
The Person Who studies about mamals , he is called mamalogist....
A person who studies animals is called a zoologist.
A person who studies physics is called a physicist, a person who studies chemistry is called a chemist, and a person who studies biology is called a biologist.
A person who studies the mind and behavior is called a psychologist.
A person who studies or writes history is called a historian.
Alligators of reptiles, so one who studies them is called a herpetologist.
a culturologist. Just kidding its called a phallololigist
A person who studies optometry is called an optometry student or an optometry student.
A person who studies a lot is often called a "bookworm" or a "knowledge enthusiast."
A person who studies sound is called an acoustician.