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Thursday, June 23, 2011
Baculum - Wikipedia, the free encyclopedia
Baculum - Wikipedia, the free encyclopedia: "The baculum is used for copulation and varies in size and shape by species. Its characteristics are sometimes used to differentiate between similar species. A bone in the penis allows a male to mate for a long time with a female, which can be a distinct advantage in some mating strategies" . . especially for a bull walrus in high arctic waters.
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