my boyfriends a great guy but the only thing that is off putting atm, is his teeth. the problem is that i dont think he cleans them. he already told me that he hates the taste of mint and he hasnt been to the dentist for a few years... he always has that white gunky stuff on them and he often smells of morning breath. i dont know how to tell him or hint at him without hurting his feelings. any advise please?