That's a shame
Even if there arent any concerns with your teeth, good dental hygiene is important and helps prevent other diseases down the road
This technique has already been used previously to analyze the effectiveness of anti-smoking laws 18 , since it provides some advantages that can be summarized as: 1) it considers the average of the complete sample and measures its relative convergence, 2) it takes into account heterogeneities, which are based in a non-linear time-varying factorial model, 3) it considers heterogeneities, which depends on a non-linear time-varying factorial model, 4) it is robust to the unit root properties of the series, 5) the results are unbiased and consistent, and 6) eliminates the need for an ex-ante sample separation since it has a new algorithm based on data to determine the clusters of the subgroups of convergence

A Philip Morris exec once wrote, hitting the youth can be more efficient even though the cost to reach them is higher, because they are willing to experiment, they have more influence over others in their age group than they will later in life, and they are far more loyal to their starting brand. Quote taken from Tobacco Explained.
Valladares M, Durn E, Matheus A, Durn-Agero S, Obregn AM, Ramrez-Tagle R
DG Cash doesn't expire as long as your account remains in good standing, so it accumulates over time