I've never used a cock or a cock & ball ring. I have a few questions:
Which is better, more effective / easier / more comfortable - the ring that goes just around your cock or the one that goes around both your cock and balls. I've also seen a double one that goes around your cock and balls separately.
What exactally does it do - keep you from cumming too quickly or maybe swell your cock a little (wife would like that) or both?