Nude photos send to husband by friend

My husband has a good friend who recently has been hanging around some weekend outside drinking and stuff. Normal stuff. But today we were in the car and he was texting him and I saw that the guy friend send my husband two photos of naked “porn” women I suppose. They were professional photos. I got a bit upset towards him and asked why he received those photos. He said idk he just sends me dumb stuff but I don’t reply. Which he is right, he didn’t reply. Am I right for feeling this way, upset and kinda angry. They are both married men who I have met his wife and her and I have become acquaintances. How would you react? Thanks