When a canine penis enlarges during climax and remains enlarged to the point where he is stuck inside the female for as long as it the mating process goes on. 

h4. See Also

* [[Ass-to-Ass Penetration]]
* [[Bestiality]]
* [[Knotted Penis]]
* [[Deep Penetration]]
* [[Dog Penis]]
* [[Tag Group:Sex Acts]]
* "Wikipedia":[https://en.wikipedia.org/wiki/Canine_reproduction#Copulation]