The song "Up N Down" by Jordan Knight is about the attraction and desire between two people. The lyrics express a desire and admiration for a woman's body and movements, specifically the way she shakes and moves. The singer offers to buy her a drink and asks for her company, but also emphasizes that he doesn't want her to feel pressured. Throughout the song, there is a theme of up and down movements, which could be interpreted as sexual innuendo. The singer enjoys the woman's unpredictability and playfulness, and describes himself as feeling like an adolescent around her. The song also references spaceships and seeing stars, which could be interpreted as a metaphor for exploring new and exciting experiences together. Overall, "Up N Down" is a catchy and upbeat song about attraction and the thrill of pursuing someone new.