Researchers partnered with the bi+ community to run the first national survey that asks bi+ people in Australia about their sex, health and relationships. The survey was open to anyone who was 18 years and over, lived in Australia and identified with a bi+ identity or had sex/attraction to more than one gender. We recruited over 2,000 participants across Australia between Sept 2024 and Feb 2025.

This study was an anonymous, online, national, cross-sectional survey of bi+ people living in Australia.

This study defines ‘bi+’ as an umbrella term for people who recognise in themselves the potential to feel sexual and/or romantic attraction to people of more than one gender, although not necessarily at the same time, in the same way, or to the same degree.

Bi+ people may identify with one or more terms such as bisexual / bi, bi+, pansexual / pan, queer, multi-gender attracted, fluid, polysexual, omnisexual, bicurious, heteroflexible, homoflexible and so on. However, some bi+ people may also identify with terms like gay, lesbian, heterosexual / straight.

In this study, ‘bi+’ also includes people who do not use any of these terms to describe themselves, but who have sex or attractions to people of more than one gender. This includes bi+ people who are public or private about their identity, attractions, or sexual behaviour.

This study is run as a collaboration between sexual health researchers, bi+ community organisations and bi+ community advocates.

This study was developed in close consultation with a Bi+ Research Advisory Group consisting of 12 bi+ community members from across Australia.

A list of the research team and community partners are below. The majority of the research team are also bi+ identified.

The study is funded and coordinated centrally by the Kirby Institute for Infection and Immunity in Society at UNSW Sydney. We also received additional funding from Gilead Sciences Inc (Gilead).

We need more data on the sexual health and relationships among people attracted to multiple genders. Despite a growing number of people identifying as bi+, there is a limited amount of bi+ specific research focusing on the sexual health and HIV needs of bi+ people in Australia. Available research often combines bi+ people with either lesbians or gay men or under the LGBTQ+ umbrella. The distinct experiences of bi+ people are therefore often missed, which perpetuates a lacking of bi+ specific data on our health and support needs.