@TroyMansplaining does have an official definition which does, indeed, appear in the Merriam Webster dictionary: https://www.merriam-webster.com/.../mansplaining-definition-history. As well as the dictionary of idioms: /idioms.thefreedictionary.com/mansplaining The urban dictionary also defines it in street slang. So it's absurd of you to say that mansplaining is not really a word, especially after you supply a definition of it, yourself, in order to bolster your argument.
I have valid reasons to stand by my argument that women/feminists originated this word, and men, as you previously stated, co-opted and tried to flip it because it was an unflattering put down of them. In spite of this admission by you, it doesn't seem to register with you, that the purity of this word was diluted by men. At its core, mansplaining is about men being patronizing to women. i insist on the proper usage of ''mansplaining" because of my love for language, and mansplaining loses its impact when not true to its original definition.
As far as i am concerned, when men interact and discuss why they cheat, this is not an exercise in mansplaining but rather a "bull session"; a very apt term. And women certainly don't need to have men explain to them why men are "dogs".