No kissing please, bad breath!
Bad breath, also known as halitosis, can be caused by a medical condition. Another cause can be, by not brushing your teeth (in the proper way) or something you ate or drank. Depending on the cause, the bad odour can occur from time to time, or can appear to be long lasting. You might not be aware you have halitosis, so hopefully you have a friend who’s brave enough to tell you. Maybe you need to tell someone else about his or her bad breath. If so, do it kindly and tactfully, as it is an awkward subject.