Have you guys ever seen seals do this?(In the photos below) Yes? Ever wondered what is it and why they do it? Well hi im bored and you deserve to know.
No, they're not kissing. Sad,i know. However it is still cute.
What looks like a kiss is a nose-to-nose touch called mutual naso nasal contact, or breath exchanging used for identification and scent check in. Muzzles have scent glands that release a unique chemical that can be used as an ID. Mothers actually use nose touches and breath exchanges to recognize their specific pup among thousands and wild seals sniff each other to check genetic compatibility during courtship.
Aquarium and circus seals often do this "kiss"-like behaviour because they're trained to do so, repeating movement they were taught through positive reinforcement training, however wildlife seals use this technique for identification and maternal care,not to be romantic.
Source : Wikipedia. Sorry for bad English, it's not my first language,and feel free to correct me if anything is wrong.