I would say no. Man and woman are one flesh. Adultery of the heart is not the same as physical adultery, but it is a sin against the Lord. Looking at porn is not the sin. Looking with an intention to lust is a sin. (And of course, what is the point of looking at porn except to lust in 99.999999% of cases.) If looking at porn is grounds for divorce, what about the man who goes to the beach and finds himself looking at a pretty woman in a bikini and then averts his eyes, once. Did he commit adultery? What about the wife who finds herself thinking some dude has a 'cute butt.' (I really don't get what could make a guys butt look cute, but I have heard that.) Does the husband have a right to divorce her.We live in a sexually immoral society. The porn is sexually immoral, but so is the rampant divorce and remarriage with no regard for what Jesus actually taught. I saw a video of a man speaking in a church about how video games can cause a dopamine rush, and especially viewing porn online. There are men who will view porn. You'd think that would rev them up and they'd want to have sex with their wives, but a lot of these men look at porn and masturbate and deprive their wives sexually.It's a terrible thing. It's immoral. But I really think you ought to send the guy for help. A minority of porn viewers are women, but there are plenty of women who watch it, too. Several years ago, I heard a standup commedian talking about some themes in porn, and the audience was laughing and carrying on like they watched it to. They don't even seemed ashamed of it. Another idea I read online was that refusing your spouse is 'sexual immorality' and gives them the right to divorce you. This seems to come about from the translators choice of translating porneia as 'sexual immorality.' Shutting your spouse down for sex is immoral, and it's related to sex, so it is sexual immorality. But it is not 'porneia.' Not having sex isn't 'whoring around.'We've got too many people looking for reasons for divorce. The list has grown far beyond what the Bible teaches to include verbal abuse, porn addiction, not supporting the pastor's ministry call, etc