I lipread, so I notice noses, teeth, lips, and types of movements. There are people I mercilessly make fun of (in private of course) and @Fiddle_Playing_Creole_Bastard, you wouldn’t be one of them! :D
Some noses do move and usually if that happens ( not always) it’s because the speaker constricts their upper lip muscles downward to make sounds. Fiddle’s nostrils flare because he is using his cheek and upper lip muscles to make his sounds. Some people talk more with their bottom lip, or neither.
Too much technical information that I kill the mood? If it’s any consolation, I think Fiddle’s adorable too!