Some years ago I remember listening to a story (pretty sure it was Escape Pod) which featured alien sex toys. As I remember it, the story was told through a shop which sold advanced sex toys for humans which were designed to interface with the nervous system - if you strapped one of them on, you would feel sensation through it. So, when aliens arrived on earth and started forming relationships with humans, new versions had to be designed to allow for human/alien matings.
Does this sound familiar to anyone?