Sorry - I was not very clear in my post. I said it was a link when in fact it was a direct quote from the site. Not sure how to verify this. Men's Health quotes the average as being 7-10 inches with 3 feet or more being possible.
This is from sexuality.org (Men's Health must have referenced it):
http://www.sexuality.org/l/sex/dsmansex.html
Generally the more frequently a man has an ejaculation, the less force that ejaculation will have. This results in a shorter shooting distance. Most of the differences, however, appear to be both genetic and age-related. Some men are able to shoot longer distances than other men, and younger men tend to have greater force of ejaculation then older men. The book "Man's Body" indicates that after prolonged abstinence - more than three days - a man may be able to shoot 3 feet or more, but the average is 7 to 10 inches with more frequent ejaculation. If one is able to ejaculate two to three hours after his previous ejaculation, the semen just dribbles out. The ability to shoot long distances not only declines generally with age, but probably varies somewhat according to the hardness of the erection, too.
I can't imagine how 18+ feet is possible, but I have read it on a couple of sites:
http://believe-or-not.blogspot.com/2...ld-record.html
record #3
http://www.askmen.com/dating/love_ti..._love_tip.html
It appears that the data comes from a book entitled
Sex World Records