this isn’t a shitpost. in skyrim’s dragon language there are pairs of distinct words such as: ‘nid’ (no/none), ‘mid’ (loyal/loyalty), ‘mu’ (we) vs ‘nu’ (now), and ‘aan’ (an) vs ‘aam’ (to serve). this indicates that dragons are able to distinguish between the sounds ‘m’ and ‘n’. 

the only difference between ‘m’ and ‘n’ is that the latter is formed with the tongue, while the former is produced with the lips 

therefore, dragons have lips 

Given when Odahviing talks to you, you can see the movement of lip plates and scales around his mouth, so my theory is that dragons have a setup like this, taking inspiration from Smaug’s design (and colour coded at the risk of looking like a clown)

Also when Odahviing is talking to you, you can see him raising the front portion of his snout to bare his teeth in a(n albeit threatening) smile, so I feel there’s flexibility there too, like a bird’s upper beak

given all of that information, it’s now obvious as to why Skyrim dragons have learned to never laugh or show happiness ever