Andy Warhol may be in heaven but his art has a hellish darkness

A new Norman Rosenthal-curated exhibition at the Ashmolean is a haunting collection of the artist’s work across a range of techniques and subjectsLooking at Andy Warhol’s painting of a bright pink penis caressed by deep black shadows from his series Torsos/Sex Parts, veteran curator Norman Rosenthal becomes nostalgic. When Rosenthal used to visit Warhol’s studio in the 1980s, he remembers, the artist offered to portray him naked. Sadly, he was not willing to remove his clothes.