(The men's wives and girlfriends used stopwatches to record the intravaginal ejaculation latency time.)

Current evidence supports an average intravaginal ejaculation latency time (IELT) of six and a half minutes in 18-30 year olds.

Those studies tend to involve subjective questions about satisfaction and control, while Dr. Waldinger considers the amount of time to ejaculate - called the intravaginal ejaculation latency time - to be the only objective criteria.

In particular, intravaginal ejaculation latency time (IELT) was found to increase with 6-13-fold, which was somewhat longer than the delay achieved by the treatment with other SSRIs (fluvoxamine, fluoxetine, sertraline, and citalopram).

Dapoxetine 60 mg significantly improves the mean intravaginal ejaculation latency time (IELT) compare to that of dapoxetine 30 mg in men with lifelong PE, but there is no different in men with acquired PE.