interesting article! I was thinking about kisses the other day when I was reading about animal behavior, and how dogs for instance lick another dog to show affection. I was wondering why we humans kiss and not lick for instance (not that I would like licking hehe,) but it's really a very particular thing we do with our lips compared to other species =)
Yep, and cats do the same as well. Every species has its way of showing affection