I know a couple people who have VR setups. There is, supposedly, a game where you have to kill a cartoon character, then cut it up to get a key. My friends are both serious gamers and have killed thousands up close (and literally billions from a distance), but they said that act made them feel really bad.

Here is a gamer talking about VR Grand Theft Auto (http://www.hardcoregamer.com/2015/04/19/grand-theft-auto-v-i...), with the same point: the emotional level is way, way more intense in VR, even crappy VR, than in normal games.

If we assume the same is the case for VR porn, I can see why the porn they made was so much more intense.