Actress-turned-author Twinkle Khanna, while speaking at an event, said that sex is important at every stage of life. "The things I found extremely attractive in Akshay have changed over time," she added. Twinkle and Akshay, who got married in 2001, completed 16 years of marriage in January this year. They have a 14-year-old son Aarav and a 4-year-old daughter Nitara.