Let's do some math. The average male German Shepherd is around two and a half feet long in freedom units, from the withers - his shoulders- to his group - the base of his tail. The average male German Shepard weighs around 80 pounds. A large one can be upwards of one hundred. Head to toe, you've got some more bodyweight, and two and a half feet on the animal.

Except, your legs - and that extra 2.5 feet - won't be part of the equation when he fucks you. You will be bent over a bed, or on all fours, or on your back with your legs spread, whatever, and all he's worried about is your cunt, and getting inside of it. Once you're down, your legs are functionally out of the equation.

So. Your legs are around 3 ft long. Once you are on the floor or bent over, we're now just comparing your torso to his; comparing the 'active' areas of your bodies when the Shepard claims you. When he's mounting you from behind, or looming over you as you lay on the floor, his torso is longer than yours. This means that, if he is on your back his head will extend easily beyond your shoulders. He could- and will- kiss you. You're his mate, after all.

Now, weight. You weigh more, barely, but being on your back or standing over you, the Shephard will have an advantage in leverage. Pound to pound, you have him beat... but once he has you where he wants you -as in, beneath him- he wins. And given that it's just ten pounds.... He wins anyway.

Here's basically what this all means: you crawl around, put your face to the floor while raising your ass, wave your hips side to side. The Shepard will approach, smell and lick you, and then attempt to mount you. You will have a short window here, as he's clawing your skin and clambering on top of you. Once he's nearly in place, he will begin thrusting, trying to find your pussy. Your ass crack and inner thighs will get slimy with every wild thrust, and his precum will begin to drool from the tip of his cock. The room will start to smell like saccharine protein powder. Your window is closing.

This is your best chance to shake him off. Every thrust gets him closer to finding his mark, and his cock is growing more stiff - if he finds your cunt, he will penetrate you. And, If he gets his cock inside of you, he will get more aggressive and desperate because he is now trying to knot you.

It takes anywhere from 30 seconds to 1 minute for an average dog's knot to completely engorge - meaning, once he has penetrated you, you have 1 minute max to get him off of you before it's too late.

However, nearly all of his weight will be on your middle and upper back, and he will have placed his front paws either over your shoulders or along the V in your abdomen to keep you in place, depending on his angle and how steep your back was when he mounted you.

Additionally, at this point, he will scratch the fuck out of you, both to mark you as his and to adjust his position. It will hurt. At this point, you'd probably be too shocked to really try to throw him off, and you'd struggle to do so anyway- because of his leverage, it'd be like doing a body weight pushup with an extra 50 pounds.

But, most importantly- German Shepherds are selfish, very rough lovers. They will bite the back of your neck- or your throat, if you're facing him- as they mate you. So, even if his knot hasn't claimed you yet, once those teeth are on your neck, he thinks that you belong to him. Those jaws close, and you are straight up his property, and he will lash out at anyone that tries to intervene, and at you if you try to escape. And, if you do get away, he will chase and bite and hurt you, attempt to bring you down. Even if his cock hasn't laid claim to your cunt yet, he- as a dominant animal- has laid claim to you- as his human, female mate.

But let's assume you're a smart and good girl, and accept your new place in the order of things. You wince and gasp and tremble, but your womanhood belongs to a dog now, and you allow your master to take it however he likes.

Bu now, his knot will have swelled and you are now tied to him. Your inner thighs are glistening with his cum, because dogs continually cum, even before you've taken the knot. Small, cloudy pools and threads of it dot the floor between your knees.

Now that you've taken the knot, however, there is no escape. His knot- a pink, gnarled, veiny bulb- is a thick as a child's fist; it is thick enough to cause a slight but visible bulge in your lower abdomen. He is now continually pumping cum into your sex, none of which can leak out from your body.

He knows that he's won now, so hell probably lick you, and you can't get away. He'll do this for a minute or two, then he'll whine and turn off of you. His knot will still be firmly rooted in your cunt, and he will awkwardly turn around, until his ass is against yours.

He does this because it creates a tighter seal in your pussy, and this is important, because he's still cumming inside of you, and faster than your cervix can carry his seed into your womb. *Your pussy is legit filling with doggy cum, and your womb is quickly becoming a reservoir for a German Shepherd's writhing sperm.

He will maintain this position for 5-8 minutes. You will start to feel full, because you are full, and now one of two things will happen: the shepard will remain calm, and his knot will shrink, and he'll plop out of you effortlessly.

Or, more likely: he will feel uncomfortable and try to pull away. Having climbed off of your back, You have the weight advantage now, so he will try to pull out, but he can't- you are functionally a dead weight within which he's buried his cock. He is to firmly tied to you, and this will stress him out. He will get upset and try to run, start to snarl and bark, and he may drag you a few inches backwards along the floor. You'll instinctively counteract this and try to lean forward, and the Shepard will feel his knot slightly sliding from you. He'll take this as a sign to keep running, so he'll keep trying to run.

And you will feel your pussy grip and stretch beyond anything you've ever imagined. It will probably make you cry and cum at the same time. It will feel like giving birth.

A few more minutes of this, and with a sloppy pop!, you'll lurch forward onto the floor, released from his knot, and canine cum will spill from you like from a faucet.

But, this is all just overflow. Your womb is already a sea of doggy genetic material, that will briefly fertilize you, before your hybrid embro is terminated by biological incompatibility... but he doesn't need to know that. All he needs to know is that he owns you - and he does. The semen spewing from your dog-mating cunt is the proof.

And then the Shepard will slink away from you, unceremoniously lick his cum - and yours- from his cock. When he's done, he'll saunter over to you, lick your cunt clean and, in a show of affection, lick your face and mouth.

Now you're less than human; the type of creature that instinctively obeys every time he mounts you, regardless of the hole; the kind of creature that will let a dog knot her as deeply as he can, even it makes you sick.

And it will - as sick as it gets you wet. But as soaked as you'll be, remember... You're not allowed to cum.

Because you ceased being human the moment his jaws clenched around your fucking neck.