I don't differentiate top-bottom, sub-dom when it comes to bondage, especially CBT bondage. The pleasure experienced over-weighs any subness. Just my opinion. Got yours?
Self-bondage for exhibitionism or masturbation has long been one of those fetishes considered underrated, but not everyone has a nearby club or fetish-friendly partner to rope with.
Cock and balls bondage usually produces "instant"results.