As someone who watches plenty of blowjob porn, the violent, deep throat, humiliation type of blowjob in porn is not mainstream. It’s niche. Those images probably stand out to you because they are shocking but they do not make up the bulk of blowjobs in porn. It’s a niche fetish.

I get your point, but that kind of oral sex is a niche in porn, not the mainstream. Most oral sex in porn is fairly normal dick sucking.