Looking for Two Stories

Story by dickgrayson

Looking for two stories, rather different from each other. For some reason I just had tiny bits of memory of both of them, quite out of nowhere, but unfortunately not enough to search by.

The one I remembered starts out with a woman who has a male? best friend into bondage and she tries out - I think, being on a rack or an X and getting her clit pumped but it turns out it's a cock. 

Which, for no particular reason, reminded me of another about a small group of futas with mutations (I think) who live in an underworld and are joined by a 'new' one of them. All I really remember is that one of the characters had a strange situation where if they were aroused their body just behaved like she was being double teamed.

If you happen to remember either or both of them, let me know. Thanks!