When I was at school, being gay, the term used then was poof or queer, meant that you were sex crazed, desperate, and actively ready, at a moments notice to anally attack anyone.
The obscession with anal sex was also presumed to apply to women, so a gay man would want anal sex with a woman.
It was also, generally assumed that gay men wanted to dress as women.
Gay men were presumed to be equally interested in attacking animals and children.
On a non sexual note, gay men were also assumed to be unreliable, untrustworthy, cowards, weak, effinate. (I was a hooker in the school rugby team and on the school sprinting team. I never joined the cricket team because I can't see objects moving at speed for some reason).
I do recall, on several occasions, discussing the association of gay sex and anal sex, suggesting that this is presumptive. The response was generally, that it is obvious!!
When homosexual relations were legalised in England in (I think) 1967, anal sex was also legalised between men, but not women.
In my own case, I wanted to be a girl and to have normal girl boy relationships. But since I knew nothing of transgender, I assumed this meant being gay as well. But like most gay people of that time, the fear of the other labels was sufficient to keep me quiet.
In my school I was, probably more than any other boy, assumed, by most, to be queer. I suppose that a combination of good fortune and my own refusal to acknowledge anything allowed me to continue relatively unmolested.
The current objections, from some groups, to teaching children, the realities of gay people's sexual interests, not to mention the practice of anal sex by otherwise hetrosexual couples are a serious barrier to a wider understanding and removal of fear of gay couples.