I find it fascinating guys want to know how long a tie lasts. I never used to time it until getting asked to on BF. My longest was 21 minutes 47 seconds, from penetration to shrunken knot and cock back in its sheath for a natural seperation, with a hung shepherd beagle mix. I can't emphasize that enough. Like a great dane packaged in an 80 pound mutt. His dick was always uncomfortable, borderline painful at first, but I was jello by the end and was always thinking about the next round. Thats the first dog I can honestly say I felt owned me. Not the other way around. He wasn't my pet, I belonged to him.