It could be that the boy has done something to annoy the girl previously. For example, he might have teased her about something she's sensitive about, like her appearance or her hobbies. So, as a form of revenge, she gives him a wedgie. Another possibility is that the girl is influenced by the wrong crowd. If she has friends who think this kind of behavior is funny or acceptable, she might be more likely to do it to the boy.
Maybe the girl is just being mean. Some kids can be cruel without a real good reason.
Perhaps it's a misunderstanding. The girl might think the boy is responsible for something that he actually isn't. In a hasty moment, she resorts to this unkind act. Or it could be part of a power struggle. In a school or social setting, she wants to show that she can dominate or get the upper hand over the boy, and a wedgie seems like a way to assert that dominance.
Chapter 669, "My First Love Sister Who Died Young", is the clearest early answer because it turns Brother Yang's situation into a concrete plot event. Early on, Bang," the door closed, but Chen Qijun's words lingered in Tai Fan's....
Chapter 691, "Sorry, You Don't Deserve It", is the clearest early answer because it turns Shang Shaobai's situation into a concrete plot event. Early on, As soon as Jiang Li was mentioned, Zhao Lang suddenly became....
Chapter 475, "Doting on the Man You Love to the Fullest", is the clearest early answer because it turns Deserted Island's situation into a concrete plot event. The chapter gives readers a real answer by opening on On the other side, Jiang Yan and Shang Shuyue also set off.
Chapter 858, "If You Dare, Take It", is the clearest early answer because it turns Shuiyun Temple's situation into a concrete plot event. The chapter gives readers a real answer by opening on Changqing flicked his horsetail whisk, face wooden, and said,...
Chapter 682, "Too Conspicuous to Keep Around", is the clearest early answer because it turns Gu Yu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Taking advantage of the still-open elevator doors, Su Yinwan quickly...
Chapter 311, "Signed Jiang Yan", is the clearest early answer because it turns Shen Lan's situation into a concrete plot event. It opens with Shen Lan knocked on the door before entering when Jiang Li was... and closes on His acting skills are quite good, as everyone can see, and most....
Chapter 526, "Has Jiang Li Turned Evil?!", is the clearest early answer because it turns Xiao Hei's situation into a concrete plot event.
Chapter 617, "Moral Kidnapping? No Such Thing!", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. The chapter gives readers a real answer by opening on The cabin wasn't far from the lake, just around fifty meters away.
Chapter 642, "Congratulations to Qi Tianyu, Points Increased by 10!", is the clearest early answer because it turns Wen's situation into a concrete plot event. The chapter gives readers a real answer by opening on We'll be the first to catch the plane, then we head straight to party!
Chapter 695, "Is This a Matter of Money?!", is the clearest early answer because it turns Shu Yue's situation into a concrete plot event. The chapter gives readers a real answer by opening on Shang Shuyue just felt she was out of luck.