1. male sexual dysfunction
   1. delayed ejaculation
      1. marked delay
      2. marked infrequency
      3. absence
   2. erectile disorder
      1. marked difficulty in having an erection
      2. difficulty in maintaining an erection
      3. erectile rigidity
      4. causes of ED
         1. psychological
            1. stress
            2. performance anxiety
            3. depression
         2. organic
            1. vascular
            2. inadequate blood supply
            3. atherosclerosis
            4. hyaline arteriolosclerosis
            5. makes arteriole harder to dilate
            6. hypertension
            7. diabetes mellitus
            8. stroke
            9. multiple sclerosis
            10. endocrine dysfunction
   3. male hypoactive sexual desire disorder
   4. premature ejaculation
      1. mild
      2. moderate
      3. severe
2. Testicular and scrotal conditions
   1. epididymitis
      1. inflammation of epididymis
      2. due to
         1. e.coli
         2. pseudomonas areginousa
         3. chlamidya trachomatis
         4. neisseria gonnrrhea
         5. more than 35 years old
         6. less than 35 years old
   2. orchitis
      1. inflammation of the testis
   3. testicular torsion
      1. testicle rotates, twisting the spermatic cord
      2. cut off blood supply
   4. cryptorchidism
      1. one or both testis fails to descends into the scrotum
   5. varicocele
      1. dilation of the pampiniform plexus
      2. due to increase venous pressure and venous stasis
   6. hydrolocele
      1. fluid accumulation between visceral and parietal layers of the tunica vaginalis