No, it's not that day, yet. It's to do with one of the suggestions that came in over the past week or so, while I've been slogging through.
"Sometime, you might do a "tutorial" on cock rings. I've just discovered a "ball ring," and have used it a few times. "Regular" cock rings have
never done much for me, probably due to ED, but when I am patient with myself, I find that the ball ring did work. I am just not sure I was doing it right; it wasn't one of those things constructed at a right angle, with parts that fit behind the balls, and also over the cock. The one I have fits around the balls, making them very accessible for stroking. Again, I'm not sure I "installed" it correctly, thus the request for a tutorial!"
Cock rings were originally designed to assist with Erectile Dysfunction, to be placed at the very base of the cock to constrict the outflow of blood to maintain an erection.
Then, guys decided they simply liked the adornment factor

but didn't want the risk of damaging the cock. Thus the ones that fit around the whole package.

And actual cock jewelry.
Most ball ring sets are designed for guys who want to stretch the sac to obtain the proverbial "low hangers."

But, there are ball rings that will isolate the testicles so the sensations are stronger.
You've got to find the style and width of band that provides comfort but also the sensations you seek.
However, just like a standard shaft-only cock ring, use ball rings with caution.