He knew that himself, Dexter was upset, so then he vented all his anger by throwing some documents and files in his working room. He couldn't focus on that day because he really didn't like the women outside of his imagination.
He only admired Stella. he doesn't know why and for what reason he can be like that. If he wanted to, that Dexter he could swap with so many women that he could easily get hold of. Changing women, maybe it was an activity in Dexter's previous life. When he didn't know Stella Veronica, the Jasper's wife.
Stella, that woman had driven him like a lunatic. And he can no longer use his logic to think.
