I find some of the tactics intriguing.
I have had a few massive and amazing hands free, no prostate stimulation, orgasms. Mostly since being in college.
They were from what I couldn't do more than what I did though.
The best was once with my roommate bringing his gf back to fuck her. I think I have talked about it on here on another thread.
I was fully expecting to have the room to myself, at least until he was done with his bootie call which I was expecting would be happening at her place.
I had been texting my gf and looking at stuff on my phone, generally preparing myself for a good wank. I hear him and her giggling outside the room, I only had seconds to be "asleep".
I let my knees fall outward, pulling the sheet tight and up, not letting my suddenly throbbing cock show it was the cause of the tent in the sheet. The only light was coming from the window and the parking lot street lights. Gave me a good view of what was going on. He had to know I was awake and was nice enough to give me plenty of T and A views. Their foreplay was driving me and my cock crazy, then he started fucking her and man was he giving her a drilling...…….at some point It was all I could do to not make any noise.
My cock shot out all of a sudden, the shot was so hard it splattered against the tightly pulled sheet like it was banging on a drum. fortunately she was in the throws of her own passion and didn't notice or realize what she was hearing. My roommate however did and it was all he could do not to bust out laughing even as he finished drilling his girl into orgasmic bliss.
We had plenty of not so hands free cums over the next few weeks talking and gong on about that night.