What's the most shocking or unpleasant thing a partner has ever done (or failed to do), and was it a deal breaker for you?

This was some years ago but this sub, and the amount of people who apparently don't know you need to wash your ass reminds me of it.

I dated this girl for a few months and every time I went down on her it was fucking nasty. Only time I enjoyed it was when I had a cold and could barely smell anything.

She told me she never uses soap on her ass. I thought she was joking at first. I told her she absolutely needed to and I don't think she ever actually did. She was also kinda nasty in other ways, always had bad breathe, smelly feet, etc. I was like 20 so I guess I didn't care then but damn.

Needless to say it didn't last long.

How about you?