Putting this separately because trying to talk to a biphobia-denier has about the same track record as trying to talk to a climate-change skeptic, antivaxer, or tobacco apologist.
Let’s break down the, “there are no laws against bisexual people.” First of all I’m going to talk just about the United States where I’m familiar with both the history and law. Since the 1960s, laws explicitly targeting minority groups have been broadly unconstitutional. Most groups are covered by the concept of “strict scrutiny” which means such a law is nearly impossible to defend. LGBTQ people so far have fallen under the “rational basis” standard, which means that the state must prove that the law is justified. The Supreme Court of the United States has been leaning toward strict scrutiny for LGBTQ people in recent years, but we’ve not had an explicit majority opinion establishing that basis.
What we have instead, are laws that implicitly discriminate in practice. An example was the recent Texas anti-abortion law, which regulated clinics providing abortion forcing many of them to close. This was recently overturned as implicitly and intentionally discriminatory. Another example is voter ID laws which theoretically apply to everyone but disproportionately disenfranchise minorities.
So in the early days of the HIV epidemic, multiple states passed criminal transmission of HIV laws, with most of the advocacy for the laws concerned with heterosexual transmission via bi men and MSMW (men who have sex with men and women, an important distinction). As one death threat I got in my youth went, “you give straight women AIDS.” Theoretically the laws apply to undisclosed transmission regardless of sexual orientation but bi men and MSMW were especially singled out.
Another legal example that disproportionately affects bi people (for readability, I’ll drop MSMW/WSWM) are at-fault divorce laws. Under these laws, homosexuality or bisexuality is grounds for voiding a marriage as a form of fraud. With bi people more likely to be in heterosexual relationships, this is a legal threat that disproportionately applies to bi people.
Then you get into the issue of selective enforcement. During the 60s and 70s police and prosecutors conducting raids made a specific point of outing married men and women. Again, this action had a disproportionate impact on bi people. In immigration systems, bi people in the last few years have been legally judged to be heterosexual and therefore ineligible for asylum or refugee status from countries where they’ve received death threats.
Then you get into issues of de facto discrimination. Again, I’ll point out that explicit legal discrimination on the basis of gender is unconstitutional in the United States but we still have huge problems with sexism. Probably the biggest area here is health care. Bisexuality was treated as immature homosexuality or heterosexual paraphilia (kink) by the medical community until well into the 1990s. Even as late as 2005, we had nationally published research by Bailey–an important gatekeeper in psychology–denying the existence of bi men. The intermediate result is that bi people get less funding, have fewer clinical models, and face routine skepticism from health care professionals. The ultimate result is nearly pandemic mental illness, a result replicated in the United States, Great Britain, and Canada.
The final level is interpersonal violence and discrimination. In the United States we consider intimate partner violence and sexual assault a systemic problem. Bi women experience both at nearly twice the rate of heterosexual women and four times the rate of lesbian women. Bi men experience higher rates of both as well. This gap can not be explained strictly in terms of homophobia. Note that in the United States, patterns of violent crimes against LGBTQ people follow the same pattern as for heterosexuals. Homes and workplaces are more dangerous than any other location. People of any sexual orientation are most likely to be victimized by someone we know.
In summary, when I talk about biphobia, I’m talking about the following:
Epidemic violence, primarily from straight people, especially directed against women by straight partners.
The systemic failure of medical communities to consider bisexual people a distinct demographic, to research biphobia as a risk factor, and to provide necessary and appropriate support and care for our needs.
The resulting epidemic of dangerous mental health issues.
Legal structures (such as at-fault divorce or biases in parental fitness) which can be used against bisexual people.
Legal structures (such as in immigration) that judge us as “really” gay or straight, usually in ways that support the status quo.
Pervasive prejudice supporting all of the above. Stereotypes such as “bi now, gay later” are not just harmful words, they are ideological justifications in support of violence and discrimination. And I’ve experienced both.