Some of my friends think that e.g. smiling leads to having wrinkles around your mouth, where your skin folds when you smile, but I'd also count if someone works in the sun a lot an thus squints all the time (if the squinting is causal, not the UV).
A Google search of the claim easily turns up some beauty people saying so. A cursory Google scholar search didn't yield much. In German it may have entered language as "Lachfalten" and in English apparently the equivalent is "laugh lines" though I've never read that.
I was skeptical of the claim, mainly because
- I imagine properly testing it would be a very big project (i.e. you'd have to have to rule out a lot of alternatives and ideally do it longitudinally with actual behaviour)
- I can easily imagine how such an idea would come about, because people who have such laugh lines may appear more friendly (misinterpretation of wrinkles as facial expression) which leads observers to reconstruct that they must have smiled a lot.
As far as I know Botox works by paralysing the facial muscles whose activity causes wrinkles so I think it's somewhat plausible.