The song "RSVP" by Heart is about a person extending an invitation to someone they deeply desire and care about. The lyrics describe the invitation as a temptation, suggesting that it will be a secretive and romantic rendezvous. The singer expresses their anticipation for the other person's response, conveying their impatience and longing to be with them. The chorus of the song emphasizes the significance of the invite, referring to it as a private affair. The protagonist refuses to believe that the person they are inviting doesn't care about them, highlighting their optimism and hope for a positive response. The repeated line "RSVP, It's a private affair" emphasizes the exclusivity and intimacy of the invitation. The singer is determined to wait until they receive an answer, believing that there is nothing more important for the other person to do. Overall, the song portrays a person taking a risk by inviting someone special into their life and expressing their desire for a deeper connection. It reflects a sense of urgency, longing, and an unwavering belief in the potential for a meaningful relationship.