What does nose touching mean?

[Black piggies]

Since losing their boar last month, my 2 sows keep touching noses. They're bonded but aren't touchy feely types. It looks like they're having serious chats, where has our husboar gone..? Or they're finally being affectionate to each other maybe. There's no butting or raised chins or any noise.

 

[Wiebke]

Since losing their boar last month, my 2 sows keep touching noses. They're bonded but aren't touchy feely types. It looks like they're having serious chats, where has our husboar gone..? Or they're finally being affectionate to each other maybe. There's no butting or raised chins or any noise.

It can be a quick, friendly reassurance that the other one is still there and with them on the same page when they are living together.

Through the bars it is saying hello, but how friendly it is depends on neither of the parties being afraid and tense (fear-aggression).