Incest, rape equaling love, characters that are so naive and passive.
Gang-banging (Threesome+) Especially with fucking rape. Rape, Incest and also characters that have no self-awareness.
Read many mangas with these and I actually feel dirtied. Fucking hell.
Like u “tits” is a huge turn off for me
Incest, rape, gang rape, threesome, fuxking without feelings?? Also when the seme is the one being chased
Characters being identified as straight, rather than bisexual.
When male characters are referred to as if they were a woman. Wife, mother, tits, pussy or that old yaoi fave of "you are dripping wet" thus assuming that the character likes being assaulted, and also showcasing that yaoi magical self lubricating anus, no lube needed.
What are some of your guys' turn-offs in yaoi/shounen ai manga?
No judgment pls (just like with turn-ons)
Me for example, I don't like it when they call a guy's chest "tits", for some reason I hate that and always click off mangas that do that.
I also don't like omegaverses.