where does the male urethra begin and end
Urethra In anatomy, the urethra (from Greek οὐρήθρα – ourḗthrā) is a tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body. In males, the urethra travels through the penis and also carries semen.[1] In human females (and in other primates), the urethra connects to the urinary meatus above the vagina, whereas in non-primates, the female's urethra empties into the urogenital sinus.[citation needed]
Canine reproduction Male canines are the only animals that have a locking bulbus glandis or "bulb", a spherical area of erectile tissue at the base of the penis. During copulation, and only after the male's penis is fully inside the female's vagina, the bulbus glandis becomes engorged with blood.[9] In coyotes, when the female's vagina subsequently contracts, the penis becomes locked inside the female.[10] This is known as "tying" or "knotting". While characteristic of mating in most canids, the copulatory tie has been reported to be absent[11] or very brief (less than one minute)[12] in the African wild dog, possibly due to the abundance of large predators in its environment.[13]