British pop star Robbie Williams joked around with the press in Mexico City on Friday (November 18), one day ahead of his concert. In his trademark relaxed style, Williams, who was accused by Oasis' Noel Gallagher of being confused about his sexuality, said he doesn't' think he needs to respond to the rumours. "It's because everybody's fascinated with celebrities' sexuality. They're all so fascinated, especially at home. I don't know what it's like here but they're all so fascinated with maybe I've got a dark secret that I'm not telling the world and I don't know why they say that," he said with a lisp and exaggerated hand gestures to a laughing audience. "The way the people write about sexuality is a joke. So when it comes to gay or not gay or bisexual or straight, who gives a? Why should that be important? I know where my penis goes." Williams is in Mexico promoting his latest album, Intensive Care. The video for its hit single, Tripping, alludes to the lifestyle of drugs he says was a part of his life. "People expect people like me to be a-- people you look up to, a role model and I'm not going to be," he said. "If people are taking drugs, nobody like me can stop them. They're doing drugs because they like them or it stops their pain or they're using it recreationally. But I would say if you want to stop, there are things you can do to stop, but if it's not harming your life, enjoy yourself." Williams, who has been accused of being self-obsessed, seems to be cruising along a career high. His latest offering, Intensive Care, released in late October, has already sold over 3.5 million copies, said EMI, the world's third-largest music company. Earlier this month he won the Best Male category in the MTV Europe Music Awards, beating competition from 50 Cent and Eminem. Saying he loves Mexico, he promised to hold a free concert on Saturday (November 19) at the famous Zocalo square, with hundreds of thousands of fans expected to attend.