Shibby has some good ones, this one is a classic with a prostate massager: Oh Snap!
Beatrix Vale has a few, this mommy-dom was fun (don't you want to be a good boy? haha) Cum for Mommy
These are not HFO per-se but with a prostate massager and the audio descriptions, they work very well.
Rodrigo y Gabriela - 11:11 what a journey