Most people probably begin to have some awareness of their sexual orientation at what point in their lives?

At a psychologist's office, Catherine is connected to a machine that gives her a visual picture of whether she is relaxing her head and neck muscles. What diagnosis probably led to this treatment?

a) narcolepsy b) sleep apnea c) panic disorder d) muscle-tension headache

Laumann and colleagues (1994) found that the second most preferred sexual behavior of Americans was

a. vaginal intercourse b. watching their partner undress c. oral-genital sex d. anal stimulation