1) Prostatitis refers to inflammation of the prostate gland. While prostatitis itself may not be directly contagious, the bacteria or other pathogens that cause infectious prostatitis could potentially be transmitted to partners during intimate contact. 2) Infectious prostatitis is primarily caused by bacteria like E. coli invading the prostate through the urethra. If left untreated, these bacteria could spread to partners. 3) Non-infectious prostatitis has no known cause and is not contagious. However, prostatitis caused by sexually transmitted infections like chlamydia can be contagious if safety precautions are not followed.