Porns pretty bad for you from a scientific perspective. Most people are addicted and have no idea. They can't even forego porn for a few weeks. And if you can't go without something, if its compulsive like that, it's an addiction. Plus I mean it makes normal sex boring by overstimulating dopamine receptors. My biggest issue with the porn industry is that it directly responsible for very much child trafficking. Children! Child porn searches are going through the ROOF nowadays, and when theres a demand, there's a supply. If its teens, don't think for a second they're not being taken and forced into it either. Some of them just like sex, some like easy money, but some (and you won't know which) are being forced to do it.

Make a deal with him. See if he can forego porn. If he can't, he may well be on the road to sex addiction.