Psychological factors play an important role. You may find it difficult to enjoy a sexual relationship if:
You are under a lot of stress
Your relationship is troubled
You have a history of traumatic sexual encounters (rape or incest)
You were raised in a family with strict sexual taboos
You're afraid of getting your partner pregnant or of contracting a sexually-transmitted disease
You have negative feelings (including guilt, anger, fear, low self-esteem, and anxiety)
You are depressed
You are severely fatigued