Beyond the obvious aesthetic reasons in character art, the stomach is traditionally viewed in many cultures as the seat of "gut instinct" and raw emotion. Placing a mark there suggests that the character’s very instincts are being tampered with by an outside force—usually a demon king or a rival sorcerer. 5. Subverting the Trope
Modern writers have started to flip this trope on its head. Instead of the mark being a source of shame or "lewdness," some stories feature knights who They turn the curse into a weapon, using the very mark intended to enslave them as a source of dark magic to defeat their enemies. How to use this for your own project: The Female Knight With A Lewd Mark On Her Stomach
In character design, a mark on the stomach is never accidental. Centered on the "core" of the body, it symbolizes a loss of control over one's own physical autonomy. Beyond the obvious aesthetic reasons in character art,