Why do designers have strange cloths on cat walk ? Does any one actually buy them ?

The clothes on the catwalks- generally speaking- aren't intended to be purchased whatsoever, nor are they really intended to even be worn by people. The crazy fashion you see at haute couture shows can be more compared to, say, a sculpture or fine arts piece. It's about the designer's vision, not the wearer. You're supposed to just look at and enjoy the whimsical designs and wild creations. These designers- based on their catwalk designs- will later design haute couture pieces at high prices for rich clientele. These pieces will be INFLUENCED by the catwalk design, but made more practical. Major design houses will then hire these designers based on their successful haute couture sales to design limited, expensive lines. These in turn are imitated by pricy but more common brands to be sold at Macy's and the likes. Those will then be imitated by common brands found at places like Target. Each generation, however, moves further from the original inspiration and becomes more utilitarian. .