T-shirts became hugely popular worldwide after being introduced in the 1950s. The document discusses why t-shirts are so popular, with one person noting their comfort and versatility. It also explores whether people choose t-shirts to match their personality, with some brief quotes from people describing what different shirts say about them. The document promotes a upcoming TV program called "PersonaliTees" airing on January 23rd about how t-shirts can reveal aspects of one's character.