Like to smell the smell of gasoline, gasoline may contain an aromatic substances (i.e., acetaldehyde) related.
Gasoline is fractionated from petroleum or cracked, cracked out of the volatile, flammable hydrocarbon mixture of liquid, its main component for the C5 ~ C12 aliphatic hydrocarbons and naphthenic hydrocarbons, in addition, also contains a certain amount of aromatic hydrocarbons, of which acetaldehyde that is with a fruity flavor, some people like to smell gasoline is mostly related to the smell.
In addition, daily life, such as paint, nail polish and other substances also contain such components, may also lead to some people like to smell, generally do not recommend too much sniffing of such substances, in order to avoid the impact on health.