"Your archaic thinking is out of step with the times, just like your fashions.
"I shall never wear Dolce and Gabbana ever again. #BoycottDolceGabbana."
In an interview with Italy's Panorama magazine, Dolce said that procreation "must be an act of love", adding: "You are born to a mother and father - or at least that's how it should be.
"I call children of chemistry synethic children. Uteri [for rent], semen chosen from a catalogue."
Gabbana added: "The family is not a fad. In it there is a supernatural sense of belonging."
In an interview with an Italian newspaper in 2006, Gabbana said: "I am opposed to the idea of a child growing up with two gay parents.
"A child needs a mother and a father. I could not imagine my childhood without my mother. I also believe that it is cruel to take a baby away from its mother."
Sir Elton has two sons with Furnish, Zachary Furnish-John and Elijah Furnish-John, born to the same surrogate mother.