I never dated a man with bad breath, so I do not know how to tell him. Like under which scenario. Our relationship is relatively young; 2 months old. I do not kiss him when he has bad breath, and he tends to ask why. It is not a stink odour like bad bad, it has a bit of an acidic unpleasant scent. It is most pronounce if he has been studying all day, or when he has exams. I want to tel him about it but I do not know how to do so without hurting his feelings. It is either I do or else we will have to break up.