Please review my examples and let me clear my doubts

1.a. My mom can smell something burning.(stative or by accident)- "transitive" "stative, i.e. involuntarily"
1.b. My mom is smelling the fragrance of a rose. (active or on purpose) "transitive" "dynamic, i.e. voluntarily"
2. This flower smells good.(stative or have a specific odor) "intransitive" "Involuntary" never used in "progressive tense".
3. This flower smells like a rose.(stative or have a specific odor) "intransitive" "Involuntary" never used in "progressive tense".
4. My mom is smelling like a dog.( progressive is not possible when "smell" is an intransitive verb)
instead,
5. My mom is sniffing like a dog. ("intransitive" "on purpose", "voluntary") is possible.
Again,
6. He is sniffing his socks to see if they need washing. ("transitive" "on purpose" "voluntary") is also possible. Please review my examples and let me know whether I am correct or not.