A 34-year-old man wth infertlity. He has a history of undescended testicle that was surgically corrected first year. He had many attacks of scrotal pain. Semen analysis reveals azoospermia, low semen volume,acidic pH. What is the cause of his infertility?

30-year-old sexually active woman presents wth vaginal discharge. On examination, there is yel-low-green, frothy discharge with a pH of 6. What is the most likely diagnosis?

A 35-year-old man with a history of depression and anxiety presents with erectile dysfunction. He has been taking an SSRI for the past year. What is the most appropriate management for his erectile dysfunction?