When does porn ruin a relationship and/or become a problem?

I am personally okay with him watching as long as it doesn't ruin our sex life and is instead used to improve it (he uses it to find something new for us etc) or if I can't pleasure him for a longer period of time (I am not there with him).

When is it not okay? When does it become a serious problem?

- If it ruins your sex life

- If it's a daily habit of his/addiction

- If the content he is watching is really offensive to you (you have small boobs and he likes to watch women with big boobs or you've been abused and he is watching something ' extremely violating'

- If he is lying about watching it and goes to extreme lenghts to hide it from you

- If he no longer finds you attractive and compares you to his favorite pornstars

- If he is subscribed/pays for it

- or something else

Please vote/comment.