For some of the practical consequences of Muhammad's teachings about Mut'ah, see the following articles:
"Syrian Mothers Selling Daughters as Prostitutes to Wealthy Saudis in Accordance with Sharia"For a more thorough discussion of Mut'ah in the Islamic sources, see the following article by Sam Shamoun:
"Muta (Islamic Prostitution) Still Common in Poor Areas of Egypt"
"Hezbollah Using Prostitution (Muta) for Recruitment"
"Temporary Marriage in Iran"