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Case Study - Why He comes very quickly during vaginal sex, although he can last longer during oral sex, hand jobs and masturbation ?
Reader: 3/28/2002>
My husband ejaculates too fast. Really too fast. This only happens when we are having intercourse...when he penetrates me..he ejaculates within seconds. I (no exaggeration) will count to 10 in my head...and by the time I'm to 8...he's finished. If I perform oral sex on him he can last for 25 minutes...if I masterbate him...he can last 25 minutes or longer...but when it comes to matter what...he can only last seconds!!! This is frustrating. We have sex quite often...sometimes 3 times a week. This has been going on now for about 5 years. It's getting old. My husband seems to think that Viagra will fix it. But he doesn't have trouble getting an erection and keeping it. He can attain one...and hold it for an's just when we have intercourse where that becomes a problem. After he ejaculates he can't get an erection for a couple hours. So it's not like he can ejaculate then a few minutes later start over. At first it was's !
not funny anymore. We do all the other stuff and I achieve an orgasm with oral sex and otherwise...but I would like to have just ordinary sexual intercourse.

Dr. Lin: 3/29/2002>He has experienced the most common middle-age men's problem - weak erection resulting in premature ejaculation. His ejaculation is thin, watery, forceless, and less in quantity. 
Weak erection forces him to contract his PC (prostate) muscles for assisting his erection during intercourse. Once he does that for couple contractions, he blows (in fact, "leaks") his semen out.
During oral sex, hand jobs or masturbation, he fully relies the heavy and full stimulation on this urethra, scrotum and groins to maintain his erection without contracting his PC muscles, where his prostate is fully relaxed; but during intercourse he doesn't have such conditions so that he has to rely on his PC muscular contraction to stimulate his Cowper's (bulbourethral) glans ( ) for secretion of pre-cum (pre-ejaculation) which contains a little Prostaglandin E-1 in partially helping his erection , but a large volume of the ripening hormone Prostagladin E-2 for immediately triggering his prostate ejaculation duct to open for seminal emission.  The Solution is: Powering his erection to relax his prostate.
You may also find out that his ejaculation is forceless, watery and extra low in quantity.
ViaPal-hGH-D (3-012) or ViaPal-hGH-M (3-014), or the high power ViaPal-hGH-P (3-010) can help him out,