Nice gimmick:

 https://rule34.xxx/index.php?page=post&s=view&id=4068801

 Dream machine:

https://rule34.xxx/index.php?page=post&s=view&id=4048425

 Machine 2

https://rule34.xxx/index.php?page=post&s=view&id=3585315

Kinky

https://rule34.xxx/index.php?page=post&s=list&tags=ddk00