Cookiecaretaker
Esteemed Citizen of ZV
Even the widest dog is narrower than a human, so you should definitely feel the texture of the walls and the division into several parts due to the muscle ring.
Tighter feel stronger. At the beginning of sex, the time for full penetration is also later, you can get deep into a wider dog sooner, with a narrower one it takes time for it to relax comfortably, you can't get to the deepest point at first.
There's a video somewhere of a human woman masturbating with a cucumber, and you can see how wide of an angle she can move it in her vagina. You can't do that with a dog because their vaginas are so tight. If you're not in the right position for sex, it's uncomfortable.
A dog's vagina is designed to be knotted and immobile, so it's tight.
