hi, been there done that.
but honestly I don't think of it as "straight turned gay". it's just people discovering more about themselves and finding a proper label to their sexuality rather than what they've put on themselves because of the norm.
I mean I thought I was straight for years until 2 years ago when I suddenly had this crisis when I thought a person of the same sex was cute. then I had flashbacks to 2nd grade when I had this weird emotion I couldn't place back then towards a classmate of the same sex. then I realized I was bi all this time lol. the more you learn about yourself.
i'm super curious since it always happens in mangas but idk about real life Σ(  ̄□ ̄||)