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Non-motile sperm cells called spermatia lack flagella and therefore cannot swim. although sperm wont live very long in cold water, they may survive for up to a few hours in hot or warm water since they thrive in wet and warm environments. It isnt usually easy to become impregnanted simply by being in close proximity to semen, but a woman who is already naked and aroused may run a greater risk. but the odds that sperm in a tub of water will find their way inside a womans body and cause her to get pregnant are extremely low. The sperm whale or cachalot (physeter macrocephalus) is the largest of the toothed whales and the largest toothed predator. It is the only living member of the genus physeter and one of three extant species in the sperm whale family, along with the pygmy sperm whale and dwarf sperm whale of the genus kogia. Sperm whales were mainstays of whalings 18th and 19th century heyday. Water-test a simple method to assess sperm-membrane integrity. Author information (1)department of obstetrics and gynecology, ospedale s. Sperm waters! Lol washing hands in water while thinking about the bear in the natural spring water commercials. sperm whale, the largest of the toothed whales, easily recognized by its enormous square head and narrow lower jaw. It is dark blue-gray or brownish, with white patches on the belly. It is thickset and has small paddlelike flippers and a series of rounded humps on its back.