Sometimes men perceive their penis as smaller than it actually is, even if it's of normal size. This thought disorder causes distress, stress, and anxiety in men. This condition is called Penile Dysmorphic Disorder (PDD). PDD is actually a type of body dysmorphic disorder. These individuals may be dissatisfied not only with their penis but also with any part of their body. This dissatisfaction not only affects a man's sex life but can also have psychological consequences. In such cases, patients may benefit from psychotherapy.