According to Osho, jealousy is not primary; it is a byproduct of sex without love—fear born of mutual exploitation and possessiveness. When you try to secure and control a partner, you kill freedom, turn a person into an object, and jealousy feeds on that fear. In real love there is trust and freedom; transform sex into love, and jealousy naturally disappears.
Jealousy shows up when we try to own someone instead of loving them freely; with real love and trust, it fades away.