To answer your questions:
1) I would only consider psychosomatic causes or anxiety if all the other urological testing is non-revealing.
2) Irritation from intercourse can lead to discomfort in the glans penis - possible due to an allergica reaction or dermatitis.
3) I am not familiar with the book you are referring to.
I would consider imaging the prostate with a transrectal ultrasound. An abscess cannot be treated with antibiotics and may cause the symptoms if this is the case.
You can discuss this option with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
kevinmd_b