To add to Waylon's post I think that if you asked one of those men, "are you a dogman?" they would say no and then ask you what that was. Meaning they don't really give a crap about the "name"....
If a true dog man was asked "are you a dog man?" I would expect to hear something like a big pause and then a well or ummm... and maybe "Ive got some dogs". I think it has more to do with others seing you and considering you a dog man than it does putting that label on your self. Oh yeah.....I think there is an age minimum for being a dog man something like 70 years old lol.
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Waylon