Should I break off the engagement?

I was reading online that some men really enjoy having a finger up their butt during sex because their prostate is sensitive. I decided with his permission to try it last night with my fiancé of 5 years. Well immediately I could tell there was poop on my finger so I pulled it out in disgust and asked him if he was okay or needed to go clean up (I thought he pooped himself). He told me that everything’s fine and acted like it was no big deal, and said that he never wipes his butt more than 1 time after pooping, even after diarrhea. He says it’s a waste of toilet paper and that you can pick up the majority of the poop with one wipe.

Honestly ladies I’m so disgusted that I’m thinking about calling off the engagement 😢 I feel like I don’t even know who he is after this. Should I break it off?