How That Butt-to-Butt Stage of Dog Mating Happens

If you ’ve ever see a pair of dogs have sexual practice , you ’ve probably observe something odd take place partway through the act . At first , the male grips the female ’s back and humps away – nothing strange about it . But then he dismounts and flex to face forth from his fellow , with his member still stick inside her .

It ’s called the copulatory tie , and the dog really does n’t have much of a option about it . His penis is literally interlock inside his mate ’s vagina . Also , he ’s still ejaculating . The pair may stay that way for 5 minute , or they may be splice for up to 40 moment .

The lock is the result of a compounding of penial inflation and vaginal hug . Like all mammals , the dog ’s member has two discrete type of cavernous tissue , one that stiffens the penis , and another that fills the glans . The member - tighten up case of tissue paper does n’t billow much in dogs , but it does make the penis stiff enough to allow the male enter the vagina when he first rise the female ( a foresightful bone embedded in the dog ’s glans tissue may also help oneself ) . Only after he ’s inside her does the glans weave expand , and expand , and expand .

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The most telling expansion go on in an area at the base of the glans called the bulbus glandis . When the firedog ’s phallus is soft , the bulbus glandis does n’t look any different from the ease of the penis . But when it inflates it grows doubly as thick and three time full than normal , and very , very stiff . When the female person ’s vaginal muscles squeeze down on this fat flock of tissue , it effectively anchor the male person in position . He ’s not going anywhere until her muscles relax and his tissues deflate .

But or else of breathe atop her back during this stage of mating , he typically dismounts and swings around until the dyad see like the pushmi - pullyu from Doctor Doolittle . The behavior is n’t singular to domestic dogs , it ’s find in most canid , including savage , foxes , and jackals . But no one really knows why they do it . It does n’t seem to be command to get the distaff pregnant : spermatozoan - fat fluid get blurt before the tie lead off . good guess so far ? The turn seems to squeeze some of the penile vena shut , keeping the ancestry inside the glans and holding him in place while he ejaculates an additional 30 mL of prostate fluids that can push his spermatozoon further into the female person .

But why that should hap butt - to - butt rather than belly - to - back is still a mystery story .

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