The dramatic increase in Americans' premarital sexual activity over the past half-century best illustrates that sexual behavior is influenced by

A) temperament.
B) personal space.
C) testosterone.
D) norms.

Premarital Sexual Activity

Sexual interactions that occur before marriage, encompassing a range of behaviors from intercourse to non-penetrative acts.

Sexual Behavior

Activities that involve seeking or obtaining sexual pleasure, which can vary widely among individuals and cultures.

Norms

Shared standards or expected behaviors within a group or society, guiding members on appropriate conduct.