Why so many fall for cads

CADS: they’ll break your heart, shatter your confidence and cost you a fortune in gin, comfort food and snivelling late- night phone calls to friends in the wake of the inevitable break up.

Yet it seems we just can’t resist them. From models to movie queens, from crowned heads to soap stars — few are immune to the smarmy charm of the cad. And they seem rampant in its upper echelons: even the late Princess Diana was royally snookered by one.

Back in 1986 former British household cavalry officer James Hewitt, wormed his way into emotionally vulnerable Di’s affections, while her husband was otherwise engaged with his then mistress, Camilla Parker Bowles.