This applies to both married men and those that are in committed relationships...
I agree w/ "cousin" Honeykiss

that the author is mainly focusing on how the woman did her wrong, and that happens, when things like this happen, the wife (or the wronged girlfriend) places blame on the woman...who doesn't know of a girl who has said something to the effect of "Yeah, he got a girl, but I don't care. If I want him, I can have him." But then, there are the "other women" who fall for the stories and lies that a cheating man will tell just to get some such as "I'm not feeling her anymore," "I'm going to leave her," etc. etc., so they look past the ring.
However, I don't play that blaming the other woman stuff...if my man cheats, it's his fault! He will get blamed for his transgressions, slapped upside the head, before I get to chasing after the other woman to "jiggle her dayum bones". Part of the poem was true, too many women get into that mode that "Boys will be boys" and allow these boys ('cuz they ain't men to me) to constantly cheat. To me, I would rather endure the short pain of kicking his azz to the curb than the long-time pain of not knowing where he's been all night & not being able to trust him. It's just a downward spiral, and it affects everything around you.
The men who wear the ring, as well as the woman should respect that ring.
That makes me wonder, do you think it is easier for the wives/girlfriends to fault the other woman than to deal with the fact that their man ain't right?
Again, I'm with ya, Honeykiss, I'm no one's sloppy seconds.