The Doctor has it right. This is a common issue, believe it or not. I have been in relationships where I had similar feelings. However, porn has never really been a big turn on for me, so normally its all fantasies. One thing about myself is I am the type of person who will do everything I can to please my partner, completely ignoring my own pleasure. It is a very tiring situation. So, sometimes a quick release is necessary. Or, in my case, I sometimes enjoy foreplay more than sex itself.

You have those types of people, and then you have the type of people who truly are addicted to porn. I would talk to him about it, and find out which type he is. If he has an addiction, he needs help. But if he is just looking for a quick release then try some other ways for you both to et pleasure. Such as foreplay as mentioned above. It can be a great help. Good luck.