We hear a lot about the Big Three Sexualities — straight, bisexual and gay. Most of us assume that these three orientations encompass the universe of sexual identities. But there is a new kid on the block: The mostly straight male.

To the uninitiated, mostly straight may seem paradoxical. How can a man be mostly heterosexual? If you’re a young man, you might assume that either you’re straight or you’re not, meaning you’re likely gay and maybe bisexual. Yet the evidence suggests that more young men identify or describe themselves as mostly straight than identify as either bisexual or gay combined.

A 2011–2013 U.S. government poll found that among 18- to 24-year-old men, 6% marked their sexual attractions as “mostly opposite sex.” That’s nearly 1 million young men. Yet when these men were forced to choose between straight, bisexual or gay, about three-quarters marked straight because for them bisexual, even if it is understood as “bisexual-leaning straight,” is too gay to accurately describe their identity. Given such constraints, these young men were left with no place to truthfully register their sexuality, thus forcing them to be less than honest.