In the current analysis due to the mechanism of effect , we evaluated the treatment benefit of duloxetine 40 mg comparing with paroxetine 20 mg , based on its effects on personal distress and interpersonal difficulty related to ejaculation , perceived control over ejaculation , and satisfaction with sexual intercourse , as well as the patient-reported global impression of change in premature ejaculation ( PE ) and the effect on intravaginal ejaculatory latency times ( IELT ) in men with premature ejaculation .