I don't want to say this, but - A warning you give before you say something that will make s

A warning you give before you say something that will make someone’s face go from happy to horrified, because you're just that kind of person.

I don't want to say this, but your dog pooped on the floor again.

I don't want to say this, but your face is like a melted candle.

I don't want to say this, but your laugh is like a rusty door creaking.