One of my favourite games while watching the traffic go by, is seeing who can set the record for most number of passengers. For most people in Asia, the scooter is the family car. You could see dad driving, with mum holding a baby and another couple of kids sitting at the front and grandma carrying the shopping on the back.
For businesses it used for transporting just about anything. In Cambodia, I saw bikes carrying double mattresses, fully grown live pigs and people safely transporting huge plates of glass. Another time I saw a guy on the back of a bike carrying an IV drip, presumably with it still attached to his arm.
Fortunately, everyone drives very safely and obeys all of the traffic signals. So safe in fact, that no-one seems to feel the need to wear a crash helmet.