gave the actress a Quaalude the first time they had sex. His alleged erectile dysfunction was exposed, as were crude texts with Marilyn Manson.Separately, Depp and guitarist Jeff Beck were accused of plagiarizing the poetry of a convicted murderer in a new song that they recorded together.But last week, the actor was riding high on headlines touting a $3.6 million sale of his artwork — titled “Friends & Heroes,” it features pop-art renderings of Al Pacino, Bob Dylan, Elizabeth Taylor and Keith Richards.According to Castle Fine Art gallery in London — where the 780-piece show was mounted and sold out “almost immediately” — the wild interest came as a surprise.