Chainsaw Man (CSM) fandom discusses on why there are doubts on Denji receiving a handjob in chapter 127 or if he simply came from being overexcited by Yoru’s touch.
I saw some people asking in other threads, so just in case people were wondering, in the Japanese, Denji says, "オレを手でシたのは", which is basically "Which one hand-fucked me?".
Yoru gave Denji a "handjob" in the sense that her hand was clearly the stimulus that caused Denji to ejaculate. I don't think anyone argued against this fact. I guess another way to say it is that she "unintentionally jerked him off"?
The root of the argument was whether or not Yoru was actively/intentionally moving her hands, which nothing in 167/168 seems to indicate that. There was no movement lines around Denji's pants area, and no sound effect text to indicate sound coming from the movement in his pants.
Also, the editor's note at the end of chapter 167 is "不意の 放出", which means "Unexpected release". It wouldn't really make much sense for Yoru to be surprised when Denji finally did ejaculate if that was her intention.