This skin to mouth tissue contact enhances feedback between caregiver and baby. (motheringfromtheheart.com)
Some folks are intolerant or allergic (if you get irritated lip or mouth tissues after eating pineapple, this is why). (marksdailyapple.com)
Commonly affected breeds are those with pigmented mouth tissues such as the Chow Chow, however other predisposed breeds are poodles, dachshunds, Scottish terriers and golden retrievers. (pethelpful.com)