Hahaha - another validation of my Itchy Butt Theorem.
One day when I was DBing my now-ex, he was grumpy and irritable all day. I damn near twisted myself into a pretzel trying to appease him, trying to change my behavior so that he'd be happy with me. At the end of the day he confesses that he's had a really itchy rash on his butt all day that has been bothering him!
Hence, the birth of the Itchy Butt Theorem - not everything has to do with you and the relationship. Some days they just have an itchy butt.