While open flames were a slight concern at first, we found that Vulpix that have grown enough for mating are more than capable of controlling their combustion naturally. That doesn't mean our researchers didn't receive the occasional lick of flame across their rears from the playful vulpines, but it helped to enhance the experience. ...In most cases. Regardless, the behavior of Vulpix seems consistent for both sexes, down to the mischievous tendencies. They tend to develop preferences towards partners relatively quickly, as even in the wild, our researchers found themselves bonded with the Vulpix they met within days, curled up next to their partner with one buried to the hilt in the other. It is recommended that trainers develop a close bond with their Vulpix, however, if one plans on breeding them as a Vulpix, or later Ninetales, then a physical bond can lead to them refusing to mate with anyone besides their trainer. As for physical precautions, it is still recommended to consume fire retardant berries regardless of the amount of control a Vulpix has. Their insides still reach uncomfortable temperatures, and feeling a good amount of semen at those temperatures sent deep inside of you might do more harm than good, especially with a knot to seal it inside. The same goes for male human and female Vulpix pairings, because no matter how tempting the feeling of steaming hot insides clenching down around your length might be, it's best to have some resistance to help you withstand it longer.