Hi Abigail3
The only time I get red "hickey" marks (rings) is when I don't use my "yoga mat" padding. I'm sure I read about the yoga mat idea on one of these threads, and the lady had posted a picture, which helped me get a good idea of how to do it.
I'm so incredibly boney that noogling without *some* kind of padding under the edges of the hard plastic dome is just too painful (and leaves bruising on my boney parts, as well as hickey rings. I did try noogling with the soft foam rings that came with the domes (Medium size) which was okay ... a bit irritating against my skin, and sometimes if I applied a little more suction the domes squeezed the soft foam rings off anyway.
But when I tried with the yoga mat it felt soooooo much better. Basically it's just a piece of yoga mat with a hole in the middle - cut about an inch smaller than the diameter of the edge of the dome itself - plus plenty around the outside, as you have to allow for quite a bit of the mat getting suctioned in, too, when noogling.
I've also found that by using the yoga mat - to cover the areas of my breast that I don't want to swell so much (such the top part) and allowing it to suction more of the area of my breast that needs fleshing out more (the lower part), I get fullness where I really want it. And so this way, so far, I've managed to get more "natural" looking female breasts (ie. with a nice "teardrop" shape). I've also managed to avoid the "nipple pointing down" effect - as I like my nipples pointing up! ;D
It took me a few hours of experimenting, to get the right size piece of mat - with the right size hole. The mat I used is about 1/2 inch thick (non-breathable, of course) and smooth. But a mat that's a bit thinner (about 1/4 inch) might work just as well, if not better. (I just cut up the yoga mat I had - actually it was a Pilates mat, which is why it was so much thicker. But I'm very pleased with the result - no more pain or hickeys, yay!)
I had tiny little bits of yoga mat all over my bedroom floor, as I sat and trimmed it down to the perfect size, and got the hole (and shape) just right.
I tested it each time, in front of the mirror. Then my husband walked in, saw me noogling with the mat, with tiny, bright coloured bits of yoga mat all over the floor, and a big smile on my face ... and he laughed, saying: "I'm not even going to ask!!"
But that's what worked for me. Glad I tried it in the first week, otherwise don't know if I would have lasted much longer. And now I absolutely *love* noogling.
Only one problem ... is now I think I'm addicted!
;D
I'm sure the long term nooglers here ... people with much more experience than me (I've only been doing it for about 1 month) may have some better ideas.
Best of luck. Once you find a way, you'll be pleased to find it's worth it :-*
Mojo