While I appreciate the personal anecdotes (and I am never using the company restroom again – I can hold it for 12 hours if necessary), the OP was looking for nationwide statistics.
So rather than shuttle this off to IMHO now, I’d ask if any stats are available.
Well, after going through all the hand outs and books I still have from three semesters of Human Sexuality, I can’t find statistics for this particular question. Doesn’t mean there aren’t any, just that Dr. Kiaser didn’t cover this particular detail of Human Sexuality and neither did my independant study. Sorry, HB.
Carina?? Will you marry me? 
I’d love to be your Ambulatory Dromedary…
Cartooniverse
At work? No way, couldn’t do that. Wish I could, it seems pretty cool, but I guess its just not for me.
I did in the work restroom once, after being, umm, stimulated by an .AVI I found on the 'net.
I used to regularly on my drive home from work, when I was driving home late at night. I drive home in the morning now, not too practical (I don’t really WANT anyone to see me).
I had a female friend who masturbated all the time…at work, in traffic, while watching ‘Magnolia’ in the theater…she was a trip.
OK, a confession. Yes, I have done it. Back in college, while studying at the library. But have pity, there were just too many hot young ladies all around me and me not poking them. Only once in my car while driving, but it was after female mud wrestling at the Seabrook Beach Club back in 1997 (they still have pics on the web). A girl tackled me into the mud. The unit kept pointing north and was begging for some relief. I don’t recommend doing it, but a long, nonstop highway is better than city driving.
Wow, this makes me feel a lot better. I did the deed three or four times as a horny teenager working boring, unsupervised jobs.
Come on, handy (pun intended :D), Admit it, you were the turkey, and the master baster, weren’t you? 
Visions of camels, and humping and…nevermind
I can back you up on that one GEO…my current GF is one of these.
one interesting thing tho,I’m starting to get a bit sick of SEX SEX SEX all the time. before now, I didn’t think it was possible for a fella to get sick of it. Don’t know about any other fella’s…do you/would you ever get sick of having a Nymphomaniac for a GF? Maybe this would be better off as a new thread…
I’d love to be your Ambulatory Dromedary…
Cartooniverse, that is too funny!!
Not yet…hang on…
okay…now what?
I stand corrected. 
I know the OP said ‘in the office’, but around here lots of guys work on the offshore oil rigs. They spend fron 7-21 days on the platform, and told me they work 12 hours, watch porn for 4 hours, and sleep 8 hours in a day.
The OP also asked for statistics regarding women who do it.
Unless there are a lot of women on the rigs (which there very well may be – I personally don’t know – have to be careful what I say here) and unless you have, um first hand (snicker) knowledge, I’m afraid that won’t help our little cause here.
Where do psychic orgasms fit into this study?
First of all, it’s interesting that this topic was started by a poster named "H8_2_W8"
[sub]and is being responded to by another poster named “DRY”[/sub]
Um, you don’t know Diane, do you? Didn’t Diane regale us with tales of having done the exact same thing?
Based on the responses to this thread, does anyone else see potential for a parody of “Green Eggs and Ham” here?
“I have done it on the can.
I have done it…”