Situation Paul and Fatima Are in Their Late 20s and Have

Situation
Paul and Fatima are in their late 20s and have been married for 2 years.Their sexual intimacy includes various sexual behaviors.Paul has noticed that while he has no difficulty getting an erection,he does have difficulty ejaculating when he and Fatima are having intercourse.Fatima rarely feels sexually satisfied after intercourse and often relies on self-stimulation to achieve an orgasm.Fatima doesn't see her lack of orgasm with Paul as a problem;however,Paul does.Paul is beginning to make excuses for not having sex.
-Paul's sexual response can probably be attributed to

A) anxiety about performance.
B) a physical problem that can be corrected with medication.
C) a variation of the normal sexual response cycle.
D) inadequate penile stimulation.