Hotel heiress PARIS HILTON has warned women to hold back from locking lips with the opposite sex for as long as possible - as she swears playing it cool is the way to lasting romance.

The blonde socialite, who has been dating Greek shipping heir PARIS LATSIS since December (04), claims there’s nothing worse than appearing “easy”, and urges girls to restrain themselves.

She advises, “Don’t let a man kiss you for at least a week.

“And try to hold him off for a month. Playing hard to get is very important so that men don’t think you’re easy.”