Searching for a Story

Story by cybermage

Hello all I am in search for a story as the title suggests.

I remember reading the 2 part series a couple of years ago and I didn't save the links to them.

The story was set in a world were temporary genetic modifications were easy to get hold of at the drug store. The first story mainly involved one female character convincing the other female character to try out a cock. She gets the second to do it but swaps the modification for a different cock than originally decided on.

I have done a fair amount of searching but my google-fu has failed me on this one.

So I turn to the throbbing hive mind for help.

Thank you