Do you think he's addicted to porn? You might want to bring this up matter of factly one time, while talking. Most people don't realize that a porn addiction can sometimes lead to 'desensitization, even impotence' sometimes. You could say "I saw it on the news or I read an internet article and ......". With desensitization, the viewer needs more and more stimulation in order to reach orgasm and then when he goes to have regular sex with a partner- they no longer feel stimulated because they've been exposed to excessive stimulation. I think if more men knew how it could be detrimental in the longterm - they would get scared and stop. Porn can literally become a trap - it draws you in and stimulates, but it can actually ruin your sex life, if it gets out of control. We get questions all the time(Q&A) regarding porn addiction and impotence and men who would rather masturbate to porn instead of having sex with their partner. I hope you feel better.