Answer:
Kinsey Report.
Step-by-step explanation:
The Kinsey reports were written by Dr. Alfred Kinsey, an American biologist who is now considered as the father of sexology.
The Kinsey reports were published the first in 1948 and the second in 1953. There were two books, one talking about the behavior in males and the other in females.
It was the first scientific study of sexual activity. And even these days the Kinsey reports stand as the largest study of human sexuality.
I hope this answer helps you.