If youre in close contact with an infected person, if you kiss them for example, or youre near them when they cough or sneeze, you can breathe in droplets of infected mucus or saliva and get the infection yourself
How to chew Nicorette Gum The method of chewing NICORETTE gum is not the same as ordinary chewing gum

It is prohibited to smoke a) means a regular passenger rail services in addition to restricted stock, in other national means of regular passenger service in waiting rooms and shelters for domestic scheduled passenger services on the covered platforms and enclosed public places associated with the transport for passengers to open platforms at a distance of 4 m from the designated area of platforms, b) medical facilities, c) in primary schools, secondary schools and educational establishments, in pre-and in the playgrounds, d) in high schools and student homes, e) social service in addition smoking room reserved for employees, f) in the cultural facilities and indoor sports facilities, g) in publicly accessible spaces and office buildings, shops, theatres, cinemas, exhibition grounds, museums and galleries, h) in a common eating facilities, except those mass caterers which have a separate section for smokers, i) in confectioneries and fast food establishments, j) in the areas in which juveniles are in custody or in carrying out prison sentences

But I grew up in the 60s and 70s surrounded by smokers
Everyone can have some personal reasons behind this but below are some of the common ones: To avoid expensive repairs from mechanics For convenience (one can use the socket to charge the gadgets anywhere) To use DIY ways to change minor faults such as blown fuse, sockets, etc