Thank you so much for your reply,

If we use a cock ring it has to be one of the silicon ones, because none of the metal cock rings we found when we were looking for a pre-made harness were big enough. I wasn’t sure if a silicon cock ring would be supportive enough to use with rope, also, it would be so tight around the dildo that it would be impossible to run any rope through it to support the base of the dildo, unless I special ordered something. That’s why I mentioned the dildo has balls, I thought maybe I could somehow use those as a stabilizing force.

That’s the primary problem. These things are freaking huge. I know how to make a standard body harness for a female, and could easily adapt it to fit a regular size dildo, but the ones he uses are extremely large (like, the kind they buy for bachelor parties as jokes), so I thought someone might have some tips or suggestions for how I can create a stable harness using a different method, or a standard method with a few tricks from experience, or something.

Also, I’ve never been on the giving end of a penis, particularly a large floppy one, so I need something that’s going to keep it sturdy and in place while I get used to how to manage it.

The same applies for the harness I need to keep the dildo inside him when I’m not wearing it. I’m familiar with a body harness for a woman, but I’ve never made one to go on a man, and usually if the rope runs through the back where I need it to go to hold the dildo in place, it also runs through the front of me. I need it to not suppress his penis, and go around it in a way that won’t restrict his ability to move.

So basically there are just a few problems that put this a little out of my league. I was hoping for a suggestion or a link to a how-to that might help. Really, anything. Thanks for reading and asking about the ring.