There are often large minute-to-minute fluctuations in the levels of a person's circulating hormones. These fluctuations are often the result of

In one form of sexual masochism, ______________, people strangle or smother themselves (or ask their partner to strangle them) in order to enhance their sexual pleasure.

A. sensual asphyxiation B. romantic smothering C. autoerotic garroting D. hypoxyphilia

Children enter the latency stage at 5 or 6 years of age and

a. usually never progress to further stages. b. generally stay there until adolescence begins. c. then enter the phallic stage at adulthood. d. stay there until the anal stage at age eight.