When I was in high school, it was trendy for girls to be bisexual (late 90s). I can't tell you how many of my friends, just one day, out of the blue, decided they were bi, only to change their minds a few weeks later. It was mostly to impress boys. I feel like most of the gender stuff now is the same as it was back then; a trend to make you seem edgy that gets you validation from your peers. Not saying it's bad. Hopefully, it leads to self-exploration and gives people a broader perspective on the world. But it most definitely is a trend.