I don't think you are crazy. But then again, I think porn is not really a big deal. Men have been sculpting statues of naked women, making what is considered the best art in world that is focused on naked women. They used to look at nudist magazines, then they had Playboy and now the Internet. I just don't seem to feel threatened by it.
If you and husband were fine in every area and having sex like bunnies, would it bother you? Explain more why you think your blood pressure would go through the roof if husband looked at cute girl in tight clothes. You did. I bet you can remember everything she wore, the curve of her body, her hair etc. I bet she is gone from his mind.
It reminds of that old proverb about the two monks who had taken vows not to every have any sort of contact with women. They come to a stream and encounter a woman who cannot cross to the other side. One of the monks picks her up and carries her to the other side, puts her down and the two monks continue their walk. The second monks continues asking how the first one could have touched a woman, how he could have broken his vows, etc. This continued for miles. Finally the monk who had carried her said calmly, "But I put her down on the bank. You are still carrying her with you"
I am not saying your feelings of jealousy are wrong. I am just asking you to think about how much power you give these women you have not met over your life.
desdamona
Arguing with reality is like trying to teach a cat to bark—hopeless. (Byron Katie)