The knot felt amazing inside me and I lay there revelling in the sensation of that huge prick in me. I felt like someone had worked a ball into me, but at the same time, it was sending sensations coursing through me that I had never felt before. Anyone who has never had a dog's knot locked inside them will not understand the sensation. When the dog mates, this tissue swells in order to sort of "latch" on to the female dog to prevent his penis from slipping out of her. This knot will stay swollen inside of the female dog even until after the male has ejaculated. Toggle navigation.