As an anecdote, I noticed this in three of my friends who smoked daily for years (2-4 years), out of four friends who did and I didn't notice this at all in friends who smoked occasionally (out of... many friends).
As an anecdote, I noticed this in three of my friends who smoked daily for years (2-4 years), out of four friends who did and I didn't notice this at all in friends who smoked occasionally (out of... many friends).