Sanemi only acts like an ass because if he acts enough like an ass nobody can get close to hurt him again. Nobody can do anything to hurt him if nobody can get close. Sanemi had to listen, all while he could do nothing, to his father. His words, the sounds of skin hitting skin. He could tell the difference between a slap and a punch with no problem. He would tense up, get uncomfortable, feel sick when his dad even walked past him. Now, when any man walks close to him he gets uncomfortable. Tengen makes him wanna crawl out of his own skin. Rengoku literally scares the fuck out of him. Iguro and Giyuu make it hard to breathe. This is also part of why he is so mean to Genya. He actively tries to ignore how scared Ganya makes him, it rarely works.
