Blushes, thank you. I'm so glad this worked for you, especially the analogy. Earlier in the year I was thinking about a visit my husband had made to the Burgess Shale and the idea of the fossil and evolution started whispering to me.

Thank you again for reading and commenting so positively, Giles and Xander treating each other as adults is one of my bullet proof kinks and I always have a ball writing them like that.