Cock rings - used for sex too? Need some info

I’ve read through all of the threads concerning cock rings and on the subject with my gf (she’d seen on real sex that they were used for better orgasms in guys if they “ripped em off” after holding it), I was curious about the application itself.

I can squeeze my wang and experience little to no discomfort, but the boys are quite sensitive and it seems that putting a ring behind them as well would not only decrease the amount of constricting force going around the base of my penis, but also hurt my sac. I didn’t see any other posts (like a good user I searched) that discussed this and I wonder if there are rings just for the cock? My balls already hang low, I was born with a “noticeable” sac (my mom has a baby picture where they look like balloons - lol) and they wear holes through the bottom of all my loose fitting boxers so I REALLY don’t want to have them get bigger.

So are there rings just for the penis? It seems this would help me keep the blood and “flaccid erection/swelled flaccidity”-look since I’d like to keep blood in there for awhile after my girth exercises, but while getting my house built, living with the gf’s mom makes it impossible to have something like a pump around to help out. Can I do this with a ring? Are they also used for sex other than maybe keeping a little more blood in the penis?

If any of you can help me answer these I’d be very greatful, I’d like to get a pump but it’s just impossible due to the lack of privacy and if I can use a ring to keep blood in the ol unit after exercises I think it would help the veins I’ve been forcing blood through to stretch, become a tad more elastic meaning better gains…

Appreciate any feedback,

nigret