Heart Thief

me: I'm going to steal your heart.

her: omg that's so romantic!!

me, an organ trafficker: ( ͡° ͜ʖ ͡°)

Heart
Crime
Dark Humor
Funny
Misunderstanding
Steal

Explanation

The humor comes from the unexpected and dark twist. The first person says they're going to steal the other person's heart, which is usually interpreted as a romantic gesture. However, the reveal that the first person is an organ trafficker gives the statement a literal and sinister meaning, creating a jarring comedic effect.