I'll answer on a personal note, and not Biblical. Personally, I say no. My husband and I both like porn from time to time. I first found out he watched it, and I almost got upset. Then I found out what he liked about it, why he watched it, and we got into it together. I think it can be a healthy thing for a relationship. As far as just a single person watching it, I say go for it. What can it hurt? Unless it turns into an addiction.