Doctor Who star David Tennant has credited pop superstar Madonna with his sexual awakening aged 14. The Scottish actor was obsessed with the singer when he was a teenager and admits he had raunchy posters of the MATERIAL GIRL all over his bedroom wall. And his teenage crush hasn't ended - Tennant admits he wouldn't turn the 48-year-old down today. He says, "She's quite extraordinary. When I was 14, the first single I ever bought was LIKE A VIRGIN. She was kind of my sexual awakening. I had some full-on posters of her on my wall. "I don't know what my parents thought. She still looks damn fit."