The song "Don't Know Why I Love You" by the Jackson 5 is about a person who is in love with someone who mistreats them. Despite all the hurt and pain caused by this person, the singer cannot explain why they still love them. The lyrics express confusion and frustration towards the situation. The song talks about how the person treats the singer like a fool and kicks them when they are down. The singer questions why they love this person despite the disrespectful treatment they receive. The person's cheating ways and their ability to laugh at the singer's face when involved with someone else are mentioned. The singer feels disgraced and wonders how long they have to endure this kind of treatment while still loving the person. The lyrics also describe how the person throws the singer's heart down in the dirt, causing them immense pain and making them crawl on the cold black earth. The singer admits to never knowing how much love could hurt until experiencing this situation. Despite all the tears and pleading, the singer still loves this person and cannot stop loving them, even though it brings them pain. The lyrics express a sense of helplessness and a plea for the person to understand the depth of the singer's love and to help them in some way. Overall, "Don't Know Why I Love You" portrays a complicated and tumultuous love relationship where the singer is torn between their love for someone who mistreats them and the pain it causes.