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and there are multiple types of sperm. some are the straight tailed attack the ovum kind. some are predastory and attack and "kill" any foreign sperm in the vaginanad uterus. Some of the sperm are curly tailed, like springs, and what they do is form a barrier locking themselves together like velcro to prevent any other sperm that may get in there from crossing the cervix.
for real. reproduction is CRIZAZY.
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