About Anish Kapoor: he seems to have pleasure in creating things that make people react. It 's wonderful to see how visitors enjoy themselves with these pieces of art.
Wikipedia:
Since 1995, he has worked with the highly reflective surface of polished stainless steel. These works are mirror-like, reflecting or distorting the viewer and surroundings. Over the course of the following decade Kapoor's sculptures ventured into more ambitious manipulations of form and space. He produced a number of large works, including Taratantara (1999),[17] a 35-metre-high piece installed in the Baltic Flour Mills in Gateshead, England, before renovation began there and Marsyas (2002), a large work of steel and PVC that reached end to end of the 3,400-square-foot (320 m2) Turbine Hall of Tate Modern.
The use of red wax is also part of his repertoire, evocative of flesh, blood, and transfiguration.