Originally Posted by
Mercurian
From my point of view, there's not a lot of evidence to say that he is withholding sex as a form of punishment. He seems to be making a lot of excuses, fights being one of them. The real question to ask is "Why is he making excuses?" It could be any reason: cheating, he fell out of love, ED, etc.
You need to ask him, not us, because we don't know.
Edit: We don't know the complete nature of the relationship, or what bad habits either of you have, so I feel it's premature to villainize this guy. We don't know what he's going through.