How do you make a dog's penis knot - Answers - Dog knot penis
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Male canids have a bulbus glandis at the base of their penises. The penis sometimes emerges few animals that have a locking bulbus glandis or also known as a "bulb" or "knot", a spherical area of erectile tissue at the base of the penis. The bulbus glandis (also called a bulb) is an erectile tissue structure on the penis of canid is completed by circular muscles just inside the female's vagina; this is called "the knot" tightening thus preventing the male from withdrawing. For domestic dogs the tie may last up to half an hour or more, though usually less.