Candidates for deep-water lifeguard training also must swim 10 yards with a 20-pound weight attached to their bodies, whereas shallow-water lifeguarding candidates can walk the distance in water while holding the same weight.
Causes of Retrograde Ejaculation. Causes of retrograde ejaculation include surgery that involves the prostate, urethra or bladder, medication and some health conditions. Damage to the prostate tissue by radiation therapy or other types of nerve damage in the pelvic area can also cause retrograde ejaculation. Signs and Symptoms Retrograde ejaculation is typically not painful and is only noted by a decrease in the amount of semen that is produced during orgasm.
Physical causes of delayed ejaculation include: 1  Certain birth defects affecting the male reproductive system. 2  Injury to the pelvic nerves that control orgasm. 3  Certain infections, such as a urinary tract infection.  Prostate surgery, such as transurethral resection of the prostate (TURP) or prostate removal.