At some point did you realize your fiance or husband may be a voyeur? Is it a bad thing?

My fiance takes pictures of women frolicking on the beach in their bikinis and butt shots too when we are on vacation together. I think he is a voyeur. I suspect he takes these types of pictures for his porn stash. He is 50 years old. So is this a bad thing. How do I deal with this or do I Iet it go?