The vagina sphincter does get stretched because the knot is being pulled on by the male dog, pushing the sphincter to open up. The female responds to that by tightening to hold the knot in place. The knot and shaft are past the vagina sphincter when they get erect so the male's penis can't be used as a guide for what human will fit. If the sphincter ever opened enough to fit the male dog's penis he would just pop out prematurely. Male dogs are rough and that would also desensitize her. It's not uncommon for bitches to yelp and scream during mating so for anyone considering this, don't do it. Evolution doesn't give a shit how the bitch feels after she's tied.
But the vagina bit your are talking about is getting stretched. I gave evidence.
You saying, it isn't, and giving interpretations disguised as evidence because you don't like the evidence.
I am just stating the obvious and you don't want to hear it and pull the evidence into a moral discussion with more interpretations that soothe your moral stands, not the facts.
This!
And? What do you want to tell me with this?
I just stated the facts, what happened.
People here interpreting what I must think about this and starting to discuss what they think my moral stands on this topic are, and now comes the weird part, they start to project their made up version of me and and starting to argue with this fantasy version of me.
Totally away from the topic, that was
Human Penis Size and Bitches
and when you have a thicker than average Penis or a small dog, the odds are, that you can't have sex without some form of stretching.
And not, I don't like the idea of stretching, have no Idea about it, because I never done this, don't listen to the guys with experience, and therefor pestering the experienced folks with made up moral arguments that ends only in a heated, of topic discussion.