[NSFW]Why the idea of gay women is more spread and considered more acceptable than the idea of gay men?

I observed that people consider “gay” as referring to love(maybe is better said sex) between 2 men.When they’re talking about 2 women,they refer to them as “lesbians” and they consider it a very hot,acceptable thing and they would love to see something like this.For some reasons when they talk about 2 men they call them “gay”,and they mean like an insult,they considered being “gay” a very bad,repulsive thing and they reject everyone who’s “gay”
This behavior I saw at men and women too(women laugh at gays too)
I’m pretty sure that these people have in mind the idea of sex between women and between men so including this point of view in your answer would be great.
I think that this situation must have some historical routes so if anyone can please give me a part or full historical answer.
So why is “lesbianism” more accepted than “gay”?