Sex has become a major leisure activity of our time, accessible to everyone, married or not, rich and poor.
Although they will go on to enjoy all the spoils of a relationship, from intimate phone calls to Christmas shopping trips and, of course, regular sex, this is understood from the outset.
They are in fact launching into a “playfair”, a 21st-century affair in which would-be adulterers meet, via specialist dating websites, to enjoy the excitement of an illicit relationship without any of the domestic fallout.
Alongside the internet dating revolution, these “playfairs” are evidence of a potentially dramatic shift in British marriage.
Microsoft has released a new advert for Internet Explorer which might just make you cry - if you were born between 19, have a taste for nostalgia and turn the music up really loud.
And now the web is 25 years old it seems as good a time as any to revisit what made it great in the first place.
But the effect for the right audience - including yours truly - is just to make you a bit weepy for a lost time when the internet made weird noises when connecting and Rage Against The Machine were still making albums.The setting is the quiet corner of an Italian restaurant in the City; the players are George, an IT specialist, and Zoe, who wears a pretty dress and a big smile; they drink an especially good bottle of wine and when they get to coffee he reaches over and kisses her on the mouth. To onlookers it might be the classic opening scene of a traditional romance.As dating websites open up a global shop window of sexual possibilities, as life expectancy continues to rise and we become increasingly sexually aware, how can we still take the crushing old rules of fidelity, that turn marriage into a prison, for granted?Why should we not be able to recapture the heady thrills of youth, while protecting a secure home life?The time has come, alongside the technology, to redraw the rules of marriage for the 21st century.Just as the Pill opened up premarital sex in the Sixties, the internet is opening up a whole new culture of affairs among married people.