Is there a 'popular' herb / vitamin that REDUCES sexual function and
desire in males ?  Let's say something you could purchase at
www.greencanyon.com or some other popular online herbal shop.

Why would you want to do that?

The only way that I know of is to have sex twice a day for one hour
starting on Monday, morning and night, for one week.  Don't miss a day
or it won't work.

Wait to see what happens on the next Monday.  Most guys will love this
routine for a couple of days.  But after one week they will be shot,
worn out, too tired to perform.  Now this will more than likely last
for one week. Now this is important, you need to start the routine of
sex twice a day for one hour again. He may beg you not to have sex. 
DON'T listen to him!  Keep in up for the whole week.  You may have to
repeat this 4 or 5 times until he finally gives up.  And he will, it
just takes time.

Remember I'm talking about the average guy, if this man's sexual
desire is greater than average you may have to repeat it more often. 
But, it will work if you follow the above routine.  I have seen this
work many many times.

Good luck.

While that may work, wouldn't it be fun to try<grin>

DJM1, please note Scubajim's response.  He was making a joke, but, and
this was from a guy, scubajim said, "it may work". See guys know it
will work.

Like I said, I've seen this work many many times.

Gentlemen,

They're plenty of drugs that decrease sexual desire as a side effect
such as Paxil and Dexedrin just to name two.  There must be a herb out
there that does the same or some formula without being harmful or
toxic !

The problem with your arguments is while having sex with one person
may become boring the chance of having it with anyone probably isn't.

Cheers ...

hmmm, so you want something that is "natural"....  This suggestion has
worked for millions and millions of women..... marry him.

you might want to look into the appropriately named Chaste Tree:

"Steeped in Greek mythology, the Chaste Tree was believed to decrease
sexual desire and instill chastity. Ceremonial uses of Chaste Tree
include the strewing of flowers along the entrances of monasteries as
a symbol of celibacy. Monk?s Pepper is another common name, derived
from            its use by early monks to spice their food. While it
was supposedly added to food to decrease libido, the berries may
simply have been used as a spice due to their peppery flavor and
resemblance to peppercorn. The species name was probably derived from
the Greek agnos and Latin castus, both meaning ?chaste,? ?pure? and
?sacred? or ?pious.? The specific and common names make it clear that
Vitex was renowned as an anaphrodisiac (counters sexual desire).      
     What is not clear is the source of this belief. It may be that
the later, internal use to suppress sexual desire is based solely upon
the early external, ceremonial uses of leaves and flowers as an
expression of chastity and symbols of celibacy."

http://www.herb-pharm.com/News/winter03_alm.html

ts

ps:  re: the above comments ... congratulations, you've just been
introduced the the GA peanut gallery . . .      ; )

The mainstream pharmacutical industry does extensive double blind
testing before FDA = Federal Drug Administration approves the use.
Most natural/alternative potions have not been so tested, so the side
effects are not always known. We should not assume any are completely
safe.
 According to the recent answers.google.com question about
masterbation; haveng sex morning and night for 7 days may be harmful
to his health.   Neil

The answer to the question was not to use masturbation or sex to
exhaust or bore one into submission.  It is to attack and approach the
issue on a chemical level, through herbs or a specific formula.

Please consider this approach and none other ...

Substances that reduce sexual desire are called 'anaphrodisiacs.'

Here are two herbal substances that are said to have anaphrodisiac properties:

"Name: Wild Lettuce 
Biological Name: Lactuca virosa 
Compositae
 
Other Names: Wild Lettuce, Lettuce Opium...

Wild Lettuce is a valuable remedy for use in insomnia, restlessness
and excitability (especially in children) and other manifestations of
an over active nervous system. As an anti-spasmodic it can be used as
part of a holistic treatment of whooping cough and dry irritated
coughs in general. It will relieve colic pains in the intestines and
uterus and so may be used in dysmennhorea. It will ease muscular pains
related to rheumatism. It has been used as an anaphrodisiac."

http://www.holistic-online.com/Herbal-Med/_Herbs/h307.htm

"Rau Rom (Vietnamese Coriander  Polygonum odoratum) The roots of the
closely related Fo-ti, Polygonum multiflorum, are used in Chinese
herbal medicine as a tonic and to stimulate hair growth, where it is
often combined with other herbs, such as ginseng (panax sp.). Used in
southeastern Asia against nausea, fever and to promote urination  It
is sometimes employed as an anaphrodisiac."

http://www.herbnet.com/Herb%20Uses_RST.htm

Hi, djm1, I have been looking for a similar effect also.

I wish for once that people could take this issue seriously.  As much
as I would like to tell MY wife, "let's just have sex more often", the
unhappy truth is that libidos between otherwise happy couples are
often mismatched.

In my case, my wife is suffering from 35+ years of diabetic
complications, bad circulation, extreme fatigue, and arthritis.  She
is simply not physically capable of taking me on three times a day as
I would prefer.  But our relationship is as strong as ever in every
other way, and I am not about to cheat on her, get a divorce or any
other such thing.

It only makes sense, then, that another perfectly logical way to
handle our mismatch in libidos is for me to start consuming a drug or
herbal product that lowers MY libido.

So, djm1, my heart goes out to you - I would like to find something
like that too.  In this sexually-supercharged society, it's only cool
to see how much sex we can have.  Joke or not, just4fun2, it is not
just limp guys not satisfying their women.  Viagra and similar drugs
are largely solving a 'popular' and 'titillating' problem, something
that people will giggle at.  Can you imagine any company marketing
something to cool us men off?

I need one, because I love my wife, and am perfectly willing to have
mine lowered to match hers, in order to be happier.

tlj

How about Evanesce from http://www.myevanesce.com/ ?

This is a herbal product designed to reduce testosterone levels.