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 premature ejaculation include: conditions such as diabetes, high blood pressure, thyroid problems and prostate disease as well as binge drinking. Some serious illnesses, such as multiple sclerosis can cause premature ejaculation, as they can result in nerve damage.