Alleged serial killer Stephen Port murdered four young men to "selfishly" pursue his sexual fetish, prosecutors have said.
Port, a 41-year-old chef, is accused of killing the men, all in their 20s, at his flat in Barking, east London, and dumping their bodies nearby.
He allegedly gave them overdoses of GHB, commonly referred to as a rape drug.
In his closing speech, prosecutor Jonathan Rees QC called Port a "habitual and compulsive liar" motivated by his sexual desires.
"The prosecution case is not hard to understand because we say this defendant was driven by his seemingly insatiable appetite for sex with Twinks while they were unconscious," he said.
Mr Rees went on to argue that Port "needed to find a way of raping them against their will. The obvious solution was drugs".
The prosecutor pointed to evidence he said showed that the four men all died shortly after being at Port's flat, and said another eight had come forward saying he had tried to take advantage of them sexually.
He asked the jury to consider whether Port had been "selfishly pursuing a fetish for drugging and raping unconscious Twinks" or whether - as Port claims - it was just a "dreadful series of coincidences".
During the trial, the jury was shown footage of Port allegedly raping an unconscious man.
Port denies murdering Daniel Whitworth, 21; Gabriel Kovari, 22; Anthony Walgate, 23; and Jack Taylor, 25.
He also denies a string of sex charges, including administering a substance and rape, in relation to the other eight men, whom he had met through dating websites.