The song "Somebody's Sleeping In My Bed" by Buddy Guy is about the regret and realization of taking someone for granted and losing them. The lyrics depict a situation where the narrator, Buddy Guy, had a good woman who was always there for him. However, he admits to acting foolish and leaving her without any valid reason. Despite knowing that it was his fault, he couldn't get over losing her. One day, as Buddy Guy contemplates coming back home, he receives a phone call from his ex-partner. She tells him that she has found someone else and is planning to marry them because she found somebody else sleeping in his bed. This revelation deeply hurts Buddy Guy, as he realizes the gravity of his actions and how he took his relationship for granted. The song expresses regret, pain, and the consequences of not appreciating the love and loyalty of a partner. Buddy Guy reflects on the fact that if he had treated his woman right, he could have been sleeping in his own bed like before. The song serves as a reminder to cherish and value the one you love before it's too late. Overall, "Somebody's Sleeping In My Bed" tells a story of lost love and the consequences of one's actions in a relationship. It serves as a cautionary tale about taking someone for granted and the regret that follows.