The Jackson 5's song "I Saw Mommy Kissing Santa Claus" tells a lighthearted and innocent story about a young child who sneaks downstairs on Christmas Eve and witnesses his mother kissing Santa Claus. The child narrates the song, expressing surprise and amusement at the situation. The lyrics describe how the child accidentally discovers his mother in a tender moment with Santa Claus underneath the mistletoe. The child tiptoes down the stairs and peeks at them while they are unaware of his presence. He mentions how his mother thought he was fast asleep in his bedroom. The song then goes on to portray the child's amusement as he sees his mother tickling Santa Claus playfully. The child imagines how funny it would have been if his father had witnessed the encounter. The chorus repeats the line "He saw Mommy kissing; kissing, kissing, Santa Claus" to emphasize the child's conviction that he saw what he saw. The child expresses his determination to tell his daddy about the incident, indicating his innocence and honesty. Ultimately, the song ends with the child asserting that he did indeed see his mother kissing Santa Claus and pleading for others to believe him. The song captures the innocence and excitement often associated with the magical moments of Christmas, bringing joy and laughter to listeners.