We have heterosexual friends who have gotten married after many years together for the same reasons.

CNN: Same-sex couples take long road to the altar

After that point, as word slowly spread, doctors began to quietly experiment with artificial insemination with donor sperm, working only with infertile heterosexual couples, turning to friends of the couple or -- once again -- their medical students.

CNN: Science led to gay families: Law should follow

Like many of their friends at the time (and some today), they scoffed at the idea as a convention of heterosexual relationships, Sandis Wright said.

CNN: Same-sex couples find their stride on wedding day