Ejaculation narcolepsy
When a guy becomes instantly tired and/or falls asleep as soon as his side of the deal is complete and he has ejaculated. This is regardless of length of time or time of day of said session.
"So, how was it with Peter?"
"Oh fine, but he got ejaculation narcolepsy after only 27 seconds so our time was cut short."
"Oh fine, but he got ejaculation narcolepsy after only 27 seconds so our time was cut short."