1 Preseed maintains this alkalinity while other vaginal lubricants tend to have pH values below 7.0 and as low as 3.5 (very acidic and deadly to sperm.  Osmolality Ã¢â¬â Semen has a specific particle concentration that keeps sperm motile and healthy.
Causes of instantaneous or sudden death. Instantaneous or sudden death may result from dysfunction/abnormalities of the heart and its vessels, noncardiac vessels, pulmonary system, and central nervous system (CNS).
Yet Another Reason to Avoid Stress: Sudden Death. Jan. 17, 2000 (Minneapolis) -- In one of the first studies to show a link between mental stress and death, researchers at Yale University School of Medicine have found that stress may actually lead to sudden death.