I like the see-through part. I'm kind of thinking of a soft, "sleeve" or wide ring thats big enough for two cocks to fit in, (like your picture), tight, but not too tight. I was thinking it might be good as an alternative to anal sex, or maybe it would be fun enough on its own! :
Oh darling, and what about something of that kind?
Especially if you were lying down together and slowly doing it. I imagine it would feel pretty good!
Wow! I feel your tight touchings and sliding...
I hope we'll try it together sometimes.