Scott Kurtz does this webcomic called PVP, which I've mentioned before. Recently he did a comic in which his characters dwell on the joy of objectifying women. Apparently he was surprised that some people were offended by it, and responded with a comic in which he depicts his own father saying to his audience words to the effect of "I think it's funny so screw you if you can't take a joke."
Now consider this is not even Kurtz's actual father defending him by dismissing any criticism, it's Scott drawing a picture of him and entirely literally (in the actual usage of the word) putting the words in his mouth. For all I know, he may have said this, but we are not told this. All we have is cartoon Kurtz senior defending cartoon Kurtz over a comic made by actual Kurtz.
Which is pretty sad and pathetic.
It's also a typical reaction of Kurtz to any criticism: don't consider if it is valid, just put down anyone who voices it and call them names. Because how could anyone not see the good natured fun in looking at boobs.
Point 1: Yes, it's something that men do. Men do lots of stuff that even they wouldn't consider appropriate to do in public. That doesn't make it right, funny, or appropriate to put it in a comic in such a way that shows you are endorsing this behaviour if you aren't prepared to take the flack for supporting such a sexist attitude.
Point 2: Getting your father to support you on this is not helping. It's just showing that you aren't the only one in the family with a sexist attitude. At least if you drew pictures of your mother or your wife standing up and supporting you it would look as though you actually cared enough about whether the comic was offensive to women to actually ask one.