Is he expressing his curiosity?

I think you are right. Generally cats and dogs are very curious. For example when I arrive at home with something new (for example a net with something) he always stick his nose into net to see what I brought. If I bring something for him (food or something) he meowing until I give him that thing. He is very cute...

awww...he's sooo cute! I think he is curious about what the camera is and how it smells like..:)..probably he thinks its food? :)

i think dgs have this habit of smelling everything they get to...so probably he is also just trying to smell and find out...u can say being curious about finding out what that thing is...but the pic is really cute..:-)