Two-thirds of straight women and one-third of straight men are unwilling to date a bisexual person of the opposite sex, according to a YouGov poll published today, during Bisexuality Visibility Week. The poll illustrates how lingering stereotypes negatively affect people’s impressions of bisexual individuals.

The poll — which surveyed 5,983 Britons during late March, including 2,031 straight women and 1,517 straight men — found that 48% of all respondents had positive views of bisexual people and only 8% had negative views. The remaining percentage had neither a positive nor a negative view of bisexuals.

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When the survey asked straight women and men why they were unwilling to date a bisexual person of the opposite sex, most (16% and 19%, respectively) said they “just don’t” or claimed, “It’s just a preference.”

A nearly similar portion, 17% of straight women and 16% of straight men, said they felt like bi people are more inclined to cheat, or that they themselves would feel insecure that they’d be unable to provide a bi partner whatever they get from a same-sex partner.

Interestingly, 9% of straight women said they feel disgust or discomfort towards men with same-sex experiences, 8% worried about possible sexual health risks, and 10% of straight men said they considered bisexuality to be either religiously or morally “wrong.” Approximately 12-13% of all straight respondents said they just wanted their dating partner to be heterosexual.