After he graduated from Wharton, Manhattan became Donald Trump’s graduate school. He majored in making money. He minored in sex, though, taking full advantage of the times and the extraordinary opportunities they offered to indulge in consequence-free promiscuity, “my second business,” Trump recalls in My Generation, now in an e-book for the first time. “If I hadn’t got married, who knows what would have happened? You had drugs, women and booze all over the fuckin’ place.”