Yeah, it adds well to and reinforces the idea that she's being completely dominated or overstimulated. I agree that it should be believable, though. Which is nice because there so many ways of doing it, tentacles, monsters, ogres, gang bangs, or just intense cunt contorting.
Ahegao in doujins is great because it's a good visual cue that the girl is enjoying it at least as much as we do. In real life you have to be able to read subtler cues, with the dreaded fact that some girls may be faking it.
Doujin girls never fake it. They're a lot more honest.
I kind of like it to a short extent, when the girls start drooling at the both, like they've had multiple seizures or like they're about to die thats when i stop enjoying it.
Mod Note: Topic has been moved from Random to the Manga, Doujinshi and Video Discussion section.
Sorry for the inconvenience caused.
Getting back on topic, some artists tend to draw "ahegao" themed works rather well. Perhaps they possess talent for such works, but I believe their skills are developed over time through practice. As not as the image isn't too messy, I am fine with such a genre.