The Aneros is the first prostate massager I've used that consistently produces an erection along with providing mind blowing multiple prostate orgasms. I find using a Tantus Silicone cock ring on the base of my shaft reinforces the erection and state of arousal for the whole Aneros session and amplifies the whole experience.
Do you put the cock ring around your dick and balls at the same time?
No, just my dick
I use an adjustable lasso type ring on my balls off and on sometimes, it makes for some fun feelings! It can be used on my cock too, and that's really fun. I get hard sometimes too, but not hard the whole session.
A steel cockring behind both cock and balls works great too, helps maintain erection and feels spectacular!