"Take the best orgasm you've ever had, multiply by 1000, and you're still nowhere near it."
These are the words which Ewan McGregor's character Renton uses to explain the allure of heroin in Danny Boyle's 1996 film adaptation of Irvine Welsh's acclaimed debut novel Trainspotting. Three years later, this writer asked former heroin addict Steven Tyler, Aerosmith's frontman, whether he could relate to this.
"Oh no, it's much better than that," Tyler answered sincerely, before delivering a crucially important addendum. "At first..."
