The thing is, /cm/ is basically the shounen-ai board, so posting anything with tits = posting off-topic things. And there's apologizing because there is an image limit for each thread (popular threads reach them all the time) so it's sort of like "O HAI SRY FOR TAKING UP SPACE WITH THIS MILDLY RELEVANT PIC". It's not misogyny, it happens in all boards XD (though of course, most of the people who hang out in /cm/ are there for the wai wai bishies).

If you want het that is not at least a little suggestive, your best bet would be /a/.