It is something that most smokers do without a second thought, but the "innocent" act of sharing a lighter may have helped to stimulate the spread of coronavirus.
Victoria's Prime Minister Daniel Andrews blamed the act for the spread of the deadly insect in Victoria.
He said: “It is not an intentional violation of anything, but one of those things where an apparently innocent thing can lead to the transmission of the virus. This is how it is extremely infectious. "
Meanwhile, Andrews added that the ride could also lead to the spread of the virus.
He said: "There also appears to be some likelihood that some hitchhiking arrangements between employees could mean that they were in closer contact than you would like."
Although Andrews suggests that the sharing of lighters may have increased the spread of the virus, it is not yet clear whether smoking increases the risk of catching the bug or not.
Some studies have suggested that smoking actually decreases the risk of Covid-19, although the World Health Organization says there is not enough information to confirm this link.
He explained: “COVID-19 is an infectious disease that mainly attacks the lungs.
"Smoking impairs lung function, making it difficult to fight coronavirus and other diseases.
“Tobacco is also an important risk factor for non-communicable diseases, such as cardiovascular disease, cancer, respiratory diseases and diabetes, which put people with these conditions at a greater risk of developing serious diseases when affected by COVID-19.
"Available research suggests that smokers are at a higher risk of developing serious illness and death."