Zachary Stockill, a Canadian man in his early 20s, experienced the breakdown of his first serious relationship due to an intense obsession with his partner’s past relationships. This condition, known as retroactive jealousy, involves persistent, distressing thoughts about a partner’s previous sexual or romantic experiences.
Stockill described how a conversation about past relationships triggered vivid mental movies of his girlfriend with her ex, leading to constant questioning and guilt-tripping. He would scroll through her old social media posts, trying to uncover details about her history, and felt jealous of events that occurred before they met.
Despite his partner’s attempts to reassure him, the cycle of doubt and relief repeated, ultimately contributing to the end of their relationship. Stockill later learned that this condition affects many others and has since worked to understand and manage it.



