Hi, my concern is my son who is 32 and is a college student (returned after a divorce for his PA). He is having erectile dysfunction for some time now and blood work keeps coming back okay...however, he has stated to me that he is hurting, and pointed to under the left scrotum area ( I am a health psychologist, so I do communicate with my sons). No erections, gfriend is 22 and feels responsible...and so on....cialis and viagra is what they have done for him so far and gave him something called ca...? not so sure this is what is wrong..do you recommend an MRI? more evasive procedures at this time?