This paper investigates the nonstandard use of first‑person singular pronouns (myself and I) in coordinate constructions, such as John and I or John and myself. Native English speakers frequently disregard prescriptive grammar rules by using subject or reflexive forms in place of object forms in sentences like Give those papers to John and I. The frequency of such nonstandard usage raises questions, such as when and why speakers substitute nominative or reflexive pronouns for object pronouns in coordinate constructions, and what evidence exists for the existence of fixed constructions like X and I or X and myself. To address these questions, the study analyzes data from the Corpus of Contemporary American English (COCA). Findings provide strong evidence for the existence of an X and I construction in that the nonstandard form is common after the coordinator but not before. Evidence for an X and myself construction is weaker, since untriggered reflexives also appear outside coordinate constructions. First‑person singular forms are more likely to appear in hypercorrect and untriggered forms that other pronouns. The research suggests that X and I may be stored in a chunk, possibly due to overgeneralizations resulting from prescriptive corrections during language acquisition.