How to love people who love eat areca?

Go online and find some photos of oral cancer for him, and tell him that his teeth will jump if he eats too much betel nut.

Long-term eat areca, teeth will slowly turn black, very ugly. In addition, calcium and betel nut juice fill the mouth, which is easy to form dental calculus. Long-term hard chewing will also consume dentin. Most importantly, chewing betel nut can easily cause oral submucosal fibrosis and leukoplakia, commonly known as precancerous oral cancer.

Fear, let your roommate live in the fear that chewing betel nut will ruin the family! Show him the photos of those who chewed betel nuts and ate too much, and then look at those who chewed betel nuts and were hospitalized. I'm sure he will restrain himself.