On average, how long should sexual intercourse really last for a woman
to have an orgasm?

In my experience, it has varied from thirty seconds to several hours.
I doubt that there's any meaningful answer to this question. Sexual
intercourse should last until both partners are fully satisfied.

I don't need sexual intercourse exclusively to have an orgasm.
 
There are many other wonderful ways to achieve orgasms :-)

Steph53

48 minutes ... no, 49 minutes ... make that 50 ... no, 51 ...

Sexual Averages lists the average time to be anywhere from 10 to 20 minutes.

It can be found here at the very bottom of the page before the listed references.

http://www.sexualrecords.com/WSRaverages.html

I agree with all the posts... it depends on the woman and "where her
head's at" at the time of intercourse. If I had to pick a number of
minutes, I's say 20-30 minutes will do it, nearly every time.

54... 55 ... 56 ...

LOL stressedmum :)

All day .. no, all night .. no, make that all week.

Yeah, Phil, with you and the rest of your footie side helping ...  ;)

Myoarin,

Concur. Haha. 4 hours be my limit. 

I knew of a girl once who asked .. "Are you guys all from the one team"?

Phil, we better duck out of this one and leave it to the girls. Myoarin

It takes exactly 5minutes and 69 seconds. BUT, requires 20 years of foreplay.

pink, where's that guy that can last 'several hours" --I mean, does he
really exist? What city should I move to to be near him? What team is
he on? Can I vote for him?

Stressedmum should be up to the 70's by now, I wonder how she's doing?

cynthia,

I'm not telling. But I may have to send him over to stressedmum's
house. Sounds as if she has an emergency going.

Tooo fuuuny!!!!!!!!!! 
Send him to my house..I'll take seconds..lol

Steph53

Send Johnfrommelbourne-ga to Stressedmum, if it is an emergency; he's closest.
(Wonder where he has been recently?)

:)

Is that in anticipation?  You know:  "anticipation is 90% ..."
Or in satisfaction?
I'll avoid suggesting the third alternative which just begs for a pun.  ;)

I forgot to say ... 57   :)  ! 

57. What a nice number. Not too long so that you start noticing that
the ceiling needs painting and wondering what you've got in the fridge
for dinner, but not so quick that you wonder if it actually happened
or if you're the pre-match entertainment prior to a big football match
(Geelong vs Melbourne; Cats won!) or that you and your needs and wants
are relegated to a "wham, bam, thankya ma'am" type effort. Yeah, after
56 minutes you realize that you both are happy to be alive and doing
what you're doing, and before you know it, woo hoo!!, then comes 57!
Yesssssss!

Myoarin .. I concur again .. we should leave the answer to the women
as the question is theirs. The answer for us blokes though is in the
rhythm of breathing. "Hours of fun for everyone" !!  :)

Each to his own ...
I use Kipling's Kim's method to avoid hyptnotism:  repeating the
multiplication table  - but never get beyond 7 times 8 ...  ;)

Myoarin, 7X8=56, that's still a bit too soon for stressedmum, she made
it to 57. --See, the thing is, the speed of sex is 68.

One more and you have to turn around.

Thanks, Cynthia, 
That's what makes this place so great, you learn something knew [sic] every day.
(I forgot explain that I do my multiplication table up to 25 for each number: 
2x 21 is 42 ... 3x21 is 63 ...  ;-Þ)  I have to admit, until I could
do the table without muttering, partners found that distracting.  But
then there was a math major (majorette?) who caught on and rushed
ahead, just naming the products ...

A clarification I should ask the customer is what orgasm is the
question about, the first one, the second one, the third one, the
fourth one, the fifth one..., the fiftyseventh one...? Girls, I do
envy you on that one...

Myoarin,

I just have to say, if you must resort to reciting the multiplication
table during the deed to avert the inevitable, then you can't be
concentrating on the woman. Breathe man, breathe .. and enjoy the
pleasures she has to offer.
Otherwise, ya just ain't doin' it right. All is in reciprocation of
giving and receiving don't ya think?

Next, someone will suggest to think of England! Equated to the same
rendition of foreplay as being: "Brace yourself Dear".

Slow is good. 

Should you have to continue with the times tables, consider the square
of 3 to the power of 4. "Eight one" might give you a clue as opposed
to the obvious 69 in answer.

Silver

Geez, the Good Book just said multiply, not do quadratic equations!
The reverse alternative  - prime numbers -  only works until you have
them down pat:  2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67
71 73 79 83 89 97 ...
and is not acceptable for RCs, who must always think:  "mulitiply, multiply ..."

Girls, you don't know the extents we'll go to to try to satisfy you!
Did I hear anyone says:  "and you still don't."
Well  - I hope not in chorus ...  ;)

Oooops!  So many variations...no law no theory applies!!!
it depends on if you want to move like 100m sprint or preparing for a
Marathan race...then wether you are trying  to reach the goal with
tounge...finger or the...conventional tool...wether you are going to
participate in the first, second, third,forth or...olympic in a
row...what should I say about those who use the doping drugs at
advantage or disadvantage to prolong only they know it...wether you
are with official partener or unofficial, unoffcial is generally
quicky but with bigger blast...and what matters more than gate of
entry is warm up...better the warm up better the result irrespective
of time.
and in the end I feel sorry for those nerds who are not out of
multiplication even when they are transiently in heaven...you people
are always not there at right time.

Hey, you_wish, mate,

... all this talk about 'wether'. You ain't wishing you were one of
those lonely farmers we've heard about from the land of the long white
cloud are you?

"Wether
A male sheep that has been castrated as a lamb."

(from /www.woolontheweb.com.au/)

Oops indeed!!! How emba-a-a-a-rrassing!