Got it today.
Got home from work, wound down with a shower, lubed up, and slipped in. I smoked a bit beforehand and just saw how I felt. Body was shaking quite a bit it felt really great. There was a few points where I remembering it shifting intensity many times. My girlfriend did join in at some point. It felt fantastic, she ended up giving me a blowjob. At that point the shaking started and there was no coming back. I don’t know where I went but I wasn’t here.
Not an HFO story but I felt like I should share my first experience.
Edit: I feel like I should specify I was at it for about 4 hours.