One of David Hockney's early paintings depicts a couple wrapped in an embrace. Painted in 1961, this picture may sound like it captures a relatively traditional romantic scene. But at the time, it was a radical piece of work. That is because the couple in the painting are both men, and in 1961 it was still illegal to be gay in the UK. Hockney, who has died aged 88 , painted We Two Boys Together Clinging as a second-year student at the Royal College of Art. Homosexuality was only partially