Final answer:
The DSM-5 specifies the cut-off point for diagnosing early ejaculation as within approximately 1 minute of initiating sexual activity, persisting for a minimum of approximately six months and occurring in at least 75% of sexual encounters.
Step-by-step explanation:
According to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), the cut-off point for diagnosing early ejaculation is within 1 minute of initiating sexual activity. Early ejaculation is identified when there is a persistent or recurrent pattern of ejaculation occurring during partnered sexual activity within approximately one minute following vaginal penetration and before the individual wishes it. This experience must persist for a minimum duration of approximately six months and must be present in at least 75% of sexual encounters to fit the diagnosis criteria set forth by the DSM-5.