The "N.E.R.D." star, who is engaged to model and fashion designer Helen Lasichanh, lost his virginity when he was 16 to someone much older to him.
"I like powerful women - women with some life experience - and I'm very attracted to intelligence," femalefirst.co.uk quoted the 39-year-old as saying.
"I lost my virginity when I was 16. She was older than me, and age has been a fetish of mine ever since," he added.