Indiana University biologist Dr. Alfred Kinsey conducted a series of sexuality studies during the 1940s and found that:

Sexuality exists on a continuum.

Explanation:

The American biologist, Dr. Alfred Kinsey had incorporated in the Institute for Sex Research. He worked on a series of sexuality studies during the 1940s in Indianan university.

Dr. Alfred Kinsey explained that the sexuality exists on a continuum. The person's sexual orientation generally based on the experience and response at that time.

Thus, the answer is sexuality exists on a continuum.