The song "Why Can't We Be Happy" by Joan Jett and The Blackhearts explores the confusion and frustration that can arise in a relationship despite having love and abundance. Joan Jett expresses her disappointment in not feeling happy despite having a partner she loves deeply. The lyrics suggest that Jett didn't intend to lose control or take her frustrations out on her partner. However, there are unexplained things in her life, like dreams coming true, that contrast with the sadness and coldness she sees around the world. She questions why she can't feel happy despite having so much. The song also touches on the pain caused by fights in the relationship and the uncertainty of how to handle them. Jett admits that even in the midst of disagreements, she knows she wants to spend her life with her partner. Throughout the lyrics, Jett emphasizes the importance of her partner in satisfying her emotional needs. She tries to communicate her thoughts and feelings, but feels unheard. This leaves her feeling tense and often drives her to seek solace in alcohol. The song's title, "Why Can't We Be Happy," serves as a plea from Jett seeking an explanation for their lack of happiness despite their love for each other. Overall, the song delves into the complexities of relationships, highlighting the struggle to find happiness and contentment even when love is present.