"Researchers working on the drug reported last month that they could
define premature ejaculation. They said a man with the condition took
1.8 minutes to ejaculate after beginning intercourse compared to 7.3
minutes for most men. They call this Intravaginal Ejaculatory Latency
Time and is timed by giving the man or his sexual partner a stopwatch."

.or a "don't stop" watch, depending on how you look at it.