Shi'ites justify temporary marriage, mutah, by their reading of Qur'an 4:24:
And all married women (are forbidden unto you) save those (captives) whom your right hands possess. It is a decree of Allah for you. Lawful unto you are all beyond those mentioned, so that ye seek them with your wealth in honest wedlock, not debauchery. And those of whom ye seek content (by marrying them), give unto them their portions as a duty. And there is no sin for you in what ye do by mutual agreement after the duty (hath been done). Lo! Allah is ever Knower, Wise.
And while Sunnis ostensibly reject this practice, it is rising among Saudis, and now we see it also here in Egypt. And as for the girls being underage, why not? Muhammad did it: "The Prophet wrote the (marriage contract) with 'Aisha while she was six years old and consummated his marriage with her while she was nine years old and she remained with him for nine years (i.e. till his death)." -- Bukhari 7.62.88
"Sordid trade in the 'summer brides': Arab tourists are 'buying underage Egyptian sex slaves' to serve them for just a few months,'" from the Daily Mail, July 15 (thanks to Kristian):
Wealthy tourists from the Persian Gulf are paying to marry under-age Egyptian girls just for the summer, according to a report.
These temporary marriages are not legally binding and end when the men return to their homes in Saudi Arabia, the United Arab Emirates and Kuwait.
The tourists pay a 'dowry' to poor families through intermediaries with prices ranging from £320 to £3,200.
The young victims - some under 18 - suffer sexual slavery and are forced to be servants to their 'husbands', claims the U.S. State Department report 'Trafficking in Persons'.
The shame of Aziza one of several 'summer wives' who live in villages around Giza, was highlighted by the paper.
Aziza - not her real name - married a 45-year-old man from Saudi Arabia when she was 17 because he promised to find a job for her brother in the Gulf, and gave her penniless parents the equivalent of £2,120, [sic]
The Saudi Arabian also bought her dresses and took her to top restaurants. He stayed a month before returning home, but promised she could join him later.
After waiting several months and now heavily pregnant, she tried to trace him through the Saudi embassy so her child could be formally recognised.
But her marriage was not officially registered which meant she could not prove her claim. Aziza had to return to her family and raise her baby as a single mother.
No foreigner can marry an Egyptian girl if there is an age difference of 10 years, according to state laws. But parents and marriage brokers are getting round the restriction.
They will forge birth certificates to make the girls appear older and the men younger. In 2009, a court in Alexandria jailed two registrars for conducting temporary marriages of hundreds of girls under 18.
Sex before marriage is banned under Islamic law and most hotels and landlords demand proof before allowing a couple to share the same room.
But the report found that many parents will marry their daughter without her consent and often the girls agree to the arrangement because their families have no money....