Crimes involving the use of guns are more likely to lead to homicides than other types of crimes, but most crimes involving the use of guns do not lead to homicides.
Promiscuous sex is more likely to be infected with AIDS than regular sex. However, only a small proportion of people who have promiscuous sex are infected with AIDS. Therefore, there is no need to emphasize the harm of promiscuous sex in the publicity of AIDS prevention
 it is not necessary to distinguish the illegal use of guns as a serious criminal offence from other criminal offences in criminal law.