Heteroflexible is a sexual orientation used to describe an individual that engages in mostly heterosexual activities and will engage in some homosexual activity. It has been termed both a behavior and an orientation. The term is used as an alternative to bisexual but unlike someone who defines themselves as bisexual, heteroflexible implies the person is "mostly straight."
Heteroflexible, or "mostly heterosexual," is believed to be a common way for people to identify. A worldwide survey of people's sexual orientations found that 80% of people identify as heterosexual. But data from the National Survey of Family growth (2011-2015) reported that 61.9% of women and 59% of men who identified as heterosexual also reported same-sex attraction.