Bisexuality is booming, with the number of people who bed men and women more than doubling, a study says. Some 7.7 percent revealed they had bi romps in 2014, compared to 3.1 percent in 1990. The stats follow the openness of Brit model Cara Delevingne and other celebrities about their bisexuality. In the same period the percentage of men who reported having had sex with at least one man rose from 4.5 percent to 8.2 percent. And the number of women who said they had bedded at least one female leapt from 3.6 percent to 8.7 percent. Meanwhile, acceptance of...