I believe that DL has grasped that hitting his wife is wrong as evidenced by the comments below, as well as by attending Anger Management classes. I think DL's 'buts' are a problem, but he probably needs to go thru that to at least identify triggers so that he can avoid them and to analyse how he arrived at this juncture.
"Lots or arguing" and being a "tempestuous relationship" and "fighting" are mentioned way before "doing it" in his original post and way before his later post about "not talking in". At no point does he say he hits her because they don't talk or have enough sex (I think that that was ver insensitive). Once again I think people are reading too much into it from their own experiences or prejudices.
4:58:27 "As for my own situation, I have to stop it [hitting], period."
4:35:57 "it's not acceptable for me to hit my DW."
1:04:29 "I am ashamed, I don't condone it ..."