Why not? It's possible, anything is possible if one alters their thinking. Of course this is a far fetched case but not impossible.
U r not straight ??
I kinda doubt it. I mean, becoming bi, ok you were just discovering sth you didn't know about in addition to your already existing likes but becoming gay.... if you thought you were straight? There's sth very weird there xD I think you'd either have to be asexual af and also very not self aware or unconsciously repressing your natural homosexuality cause you were raised to think it's bad. Either way it seems rather unlikely to me
Can a guy who is straight become gay by just reading yaoi(being a fudanshi)?