Coughing Hugs

So Jared and I are stumped. Alder has started this really odd thing where when either one of us cough while we hold Alder and specifically when we do so in his nursery, he buries his head into our neck and breathes really deep and slow. And Alder will stay like this for as long as a minute. He will sometimes do it in other areas of the house, but never outside. Is it that he feels scared that that sound is coming from us? Does he think that it means sleepy time? Who knows? But it is really sweet though for him to snuggle up to you. I catch Jared making himself cough so lil Alder will snuggle with him. Sweet but kind of cruel if Alder does it b/c he is scared. I caught it on video. Sorry it was late afternoon and the nursery lights were not on. I hope you can see it alright.