Let's Put The X In Sex

The lyrics tell a playful story about a mysterious admirer who sends a suggestive photograph, calls at night, and finally appears at the speaker’s door in a disguise. The speaker is curious and excited, but the repeated hints and delays keep the encounter secretive. The mood is teasing and flirtatious rather than serious, with anticipation building until the speaker recognizes the visitor.

“Put the X in sex” is a pun: “X” suggests something adult or sexually explicit, while the phrase turns that idea into a playful invitation. Calling love “a muscle” that makes the speaker want to “flex” connects desire with physical strength and showing off. The “private eye” line borrows the term for a detective, suggesting that the speaker is trying to uncover who the admirer is; “undercover” also fits her disguise and the secret nature of their flirtation. An “eyeful” means a lot to see, while a “peek” is only a small glimpse.

The clues strongly suggest that the visitor is someone the speaker already knows, and the black lace helps him identify her. Still, the lyrics leave her identity unstated, so the mystery is part of the game. The secretive language may imply a hidden affair, but it could simply be theatrical role-play between two people. The song emphasizes excitement and fantasy, not the details of their relationship.