Oh, no doubt. I think mares have at least very aesthetically appealing pussies. While I've never personally encountered a mare, I think dogs are pretty functional. Dog pussy (especially in heat for me personally) seem like they were designed in a lab somewhere to ensure I never last more than a few minutes inside one, which I guess is kind of the point of heat. They just don't really compare to humans in that sense. Would obviously be down for a mare, should the opportunity arise.