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).
In 1900, these top three causes of death were from communicable diseases. Since the 1940's, most deaths have come from a completely different category of disease called lifestyle diseases.[17] Until the present era, sudden onset caused death due to infections, malignancies, injuries, poisonings, and war.