Just got banned from UK porn. Some of the explanations are pretty funny. I was particularly amused by...
Ballbusting may be acceptable, depending on the level. OFCOM recommend submitting clips in question for review. It will come down to definition of moderate pain and whether viewers at home are likely to sustain serious injury if they try it at home. Hence ball-yanking is not acceptable; whereas controlled ball stretching is acceptable.
Full list below!