The rules dating summary

I have never been a "Rules girl" (that's right, they're a tribe – Blake Lively and Beyoncé are both rumoured to have tried them, on Leonardo Di Caprio and Jay Z respectively).

Catherine is at first intimidated and fearful of Jason's disability.

On the other hand, Kristi is a fashionable, "cool" girl that Catherine is desperate to befriend.

Meanwhile, Kristi comes over to Catherine's house, and Catherine is terrified that David will somehow ruin their blossoming friendship.

Catherine continues friendships with both Jason and Kristi.

Before these, there was just the telephone, which you invariably watched until it rang. Well, I did, but I already told you I wasn't a Rules girl.

Fein and Schneider have even enlisted the help of their teenage daughters, to add their own take on romance in an over-connected era."These days, it doesn't matter whether a guy calls, texts or emails to ask you out," goes one of their hymeneal homilies, "as long as he asks you right." "Technology is great," continues Schneider. But it's the overuse of technology that is the problem. They're addicted to answering guys back in nanoseconds and they're not getting dates.

As the gurus who invented call screening, curtailing any contact that isn't face-to-face as quickly as possible, and good old-fashioned ignoring, this strikes me as particularly apt.

The New Rules: The dating dos and don'ts for the digital generation, (£9.99, Piatkus) published this month, offers their signature sagacious take on the grey area where sex and cyberspace intersect.

Rules is the story of a twelve-year-old girl named Catherine, who is torn between caring for her autistic brother David and finding her own place in life.

Catherine's day-to-day life during one summer vacation is usually occupied by caring for David and trying her best to keep him out of trouble.

And it's an important subject to address, given the de-mystification of internet dating and the rise of outlandish digital phenomena such as "sexting".

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