Both the seminal vesicles and prostate gland give the seminal fluid mildly alkaline properties.
Note: Such is done in order to help the sperm survive in the relatively acidity of the female reproductive tract.
Note #2: The prostate enlarges with age and frequently causes problems in older males, including benign prostatic hyperplasia. Because the prostate surrounds the urethra, classic symptoms of this condition include urinary frequency, urgency, and nighttime awakenings to use the bathroom.