HA! Surprisingly, I gave up all pork years ago.
Very well explains it this "phenomena":
"Of the 30 mail-order bride couples Mila Glodava (Glodava and Onizuka, 1994) encountered between 1986 and 1993, only two were close in age (4 -6 years difference). In the other 28 there was a 20 to 50 year difference in age. Older men, says Glodava, often want women "they can mold" and therefore do not want those who are too educated. "They would just become like any other American woman," they said. She concludes that, "It is apparent that power and control are critical for the men."
this is from
http://uscis.gov/graphics/aboutus/repsstudies/mobappa.htm (someone posted this URL already)