Tell him to stop being such a "sad sack"! Seriously though, I'd call your primary care physician immediately (I can't beleive you guys havn't already), and see what he/she recommends on doing. Go to the emergency dept. if you guys don't have a regular doctor. Good luck, I pity the man.
If you cant get into a urologist right away then get to the er. They can help speed up the process and get him more comfortable. Good luck!
Consult a urologist ASAP! Causes of pain in the testicles can be varied, from trauma, inguinal hernia, or orchitis because of an STD, just to name a few. We need to diagnose the problem first before we can treat the patient.