There is an over abundance of stories about lesbians falling in love with or sleeping with men.
There are a ton of shitty examples (Chasing Amy, Kissing Jessica Stein, The Kids are Alright) in mainstream media. For some reason filmmakers in particular love to tell this story (though literary adult fiction does it a lot too). It always ends with the lesbian either staying a lesbian, turning straight, or adopting some vague no labels bs so she can be with the dude.
I know no lesbians who like these stories. They are sick to death of seeing them.