The boys were identical twins.
Nobody could tell them apart, not even their parents. They had always had great fun pretending to be one another. They often used this to trick people, especially their teachers and school friends. It was this constant sharing of these playful deceptions that brought them close together. For this reason they deliberately combed their hair the same way, wore the same outfits and more generally maintain similar body language to the degree that it made it just about impossible to say which one was which. These deceptions, many of which went by unnoticed, were played out over a number of years. Being activities that gave them both a lot of entertainment, they happily kept them going. Over the years they shared this common goal of keeping people guessing.
However, the enjoyment and the camaraderie that these pranks afforded them came to an abrupt and troublesome end when they were in their middle teens. One of them, it has never been established which one, asked the other to buy a lottery ticket for him while he was at the shops. When it was drawn, the ticket that had been purchased won first prize; a huge jackpot figure. It was a life-changer for one of them. It should have been a time of celebration. Instead, it became an issue that would cause a great deal of anxiety and anger for their parents, many of those around them, and themselves. It was never determined which one of them actually paid for the ticket.
As deceptions go, it did bring to light the fact that, for them, sharing has its limits.