1. If one party has bad breath, the other party is likely to smell it when kissing.
2. Bad breath is usually caused by poor oral hygiene, dietary habits, digestive system problems, or other health factors, which can lead to unpleasant odors in the mouth.
3. To avoid letting the other person smell bad breath when kissing, it is recommended to maintain good oral hygiene habits, such as brushing teeth regularly, using dental floss, mouthwash, etc., and pay attention to healthy diet, avoiding excessive intake of irritating foods.