That Sweater by Scott Helman is a song about teenage love and the obsession and infatuation that can come with it. The protagonist is deeply in love and can't help but think about their significant other all the time, including the sweater they always wear. The song talks about how love is a battle and how it can be infectious. It also touches on the idea that it's all about the mood and not about the show. The protagonist is experiencing a range of emotions, from feeling low to being in love and on their homie's couch. They want their love to be louder than anything else, to drown out all other noise. The song starts and ends with the sweater, showing how it's a constant reminder of their love. The protagonist wants to make their significant other shout, to express their love and affection loudly. In conclusion, That Sweater is a heartfelt song about teenage love and the intense emotions that come with it. It's about being infatuated with someone and wanting them to be a part of your life no matter what.