Lady Gaga is the first major star of the digital age. * * * [D]espite showing acres of pallid flesh in the fetish-bondage garb of urban prostitution, Gaga isn’t sexy at all – she’s like a gangly marionette or plasticised android. How could a figure so calculated and artificial, so clinical and strangely antiseptic, so stripped of genuine eroticism have become the icon of her generation? Can it be that Gaga represents the exhausted end of the sexual revolution? In Gaga’s manic miming of persona after persona, over-conceptualised and claustrophobic, we may have reached the limit of an era…