We've been know to lambast stupid sluts here too......
I guess it's a reaction to having men continually blame women for their bad behavior. And you are probably right, it's either BS or it's some poor misguided person thinking that this form of confession will actually help his wife forgive him. Sad on any level.
My husband has never cheated on me, but as he likes to quote Jimmy Carter "I've felt lust in my heart"....And I have found some rather questionable bookmarks under his name, but I guess I trust him completely. Doesn't matter if he wants to look, but he knows his limits as he is all man in my book.