Bing shows results that MS asked Google to take down

Your entire argument seems to be predicated on this idea. But the thing is, pretty much every linguist in the world would disagree with the notion. The connotations of words are constantly shifting — there is ample evidence of this throughout the history of languages.

I applaud you for thinking about this sort of thing and speaking out about it, but in this particular case I think you're tilting at windmills.

Even if we accepted this absolutist stance where words' meanings do not change no matter what the common perception or intent of the speaker might be, it still wouldn't be offensive to women. If the word's connotation is immutable, then it does not refer to human women at all, but to dogs, and thus human men have just as much right to the word as human women do. But surely you'd agree the word has acquired new connotations since then, contrary to your claim above.

There might have been some point in history at which your stance was the right one, but if there was, I think that time is long gone. I don't know if you're just that old or if your regional dialect is odd in this regard, but I'm pretty sure the verb "bitch" is not gendered in most people's mental lexicons today. Because it is not particularly associated with them, it does not actually do any harm to women as a group if you use it.

(Note that all this is distinct from the noun "bitch," which is applied to men but is still has gendered associations. Probably best to avoid that one. And obviously avoid both in formal contexts.)

What? Does not compute.

So think about this. You've seen it applied to both genders. How is it applied to men? "Whiny little bitch"; "I'm gonna make you my bitch"; "Suck it, bitch"; "Stop bitching ..." Here's what those phrases mean to people, not in the past but today: "you're acting like a weak, pathetic woman"; "I'm going to sexually dominate you like a woman".

How is it applied to women? "Stop your bitching." "Shut up, bitch." "She's such a bitch." Can you guess how those ones come across? "Shut up, stop complaining, and smile the way you're supposed to." "I own you; do what I say." "She doesn't act the way women should."

Right now (if you're not a terrible person :) you're already typing "that's not what it means when I say it!" And I sorta believe you, and that's great. But there's a reason that if you stop using "bitch," you won't have a good word to replace it. "Bitch" is a powerful, useful word exactly because it's great for calling men women, and telling women to stay in their place. Those messages hit hard, because it hasn't been very long since women were literally property, so having a quick way to hit someone with them comes in handy. And you don't get to choose how people hear your words -- when you use it, that's what's lurking right under the surface, and it's what a lot of people will hear.

Go ahead and keep doing it if that's your thing. Even try to reclaim it. But some of us are going to think you're just another schmuck blindly supporting the idea that men are one way and women are another way and men should be in charge of women. I haven't used the word "offensive" here, because that makes it all about me. I'm not offended.* It doesn't matter if I'm offended. What matters is that words promote ideas, and the word "bitch" promotes a stupid idea, and you might not want to do that.

* (Offended is such a weak emotion anyway. I recommend self-righteous anger, bitter amusement, cold calculation or cynical detachment. No one is merely offended.)