The anti-porn lobby has been going crazy with this study since its release.
I guess when you are desperate for any grain of data backing your totally failed "porn is bad" hypothesis (porn has been a click away for hundred of millions going on 30 years now), you'll latch on to anything.
Ironically if you read the study, it's basically "People enjoyed the act and consented to it, but it's bad because not breathing can be fatal and it's also illegal in Australia". It's also a singular study (rather than a long term trend meta-study) with an online survey data collection method, so about as low of a rigor as you can get.
Of course though, it's gone around heavily marketed as "Record levels of boys are watching porn and going around violently choking out young women because of it".