I got a similar problem: even if usually (warm/hot temperature) they hang 2/3 inches, sometimes (recently often, I wonder why) during sex they are so close to the shaft they are pushed upwards, meaning on the other side of the shaft itself.
It’s rather weird to see the testicles above the penis.
In the end I just don’t like it, so I begun ball stretching too; now I’m looking for the best way to do it.
Rings? Weights?