Have the people defending porn use actually looked at the popular porn sites within the last 10 years? If you're imagine soft focus shots of Sam Fox rubbing her boobs or a couple or a few people having passionate sex that appears consensual, then think again.
The most popular stuff on all front pages is all about force, violence, simulated (or not) pedophilia, abuse, choking, spitting, incest, degradation and the sexualised use and abuse of women and girls. Look for yourself (or read the studies if you have more sense).
Are they wading through the suggestions to get to non abusive/illegal looking stuff? Maybe, but maybe they are instead reinforcing misogyny in their brain one wank at a time. And the non disgusting stuff is still paid prostitution/rape at the end of the day and the psychological effects of of porn actors (men and women) is very well documented.
I am aware of 'ethical porn' but how can you ever really know? Loads of people active in the sex industry report they are happy with it when they are in it, later the tales of coercion, abuse, drug use come out.
Written or drawn stimulation (depending on what it depicts - reinforcing pedophilia etc is not ok) is great.
Wanking and sex is fun...porn with real humans rots your brain, contributes to misogyny, abuse, crime and more. If you can turn a blind eye while knowing he consumes that behind the bathroom door then shame on you - weak and desperate behaviour.
I don't believe every man does it but I'd never risk it.
OP - I'd be dreadfully hurt but you know your boundaries - 'allowing' himself to be caught is either another layer - either he wanted you to know (I won't speculate why) or he's dumb and too desperate to wank.