>> I get the feeling that some women just can't take a joke.
Your sentiment will no doubt be shared by many. The point with offense though is it's not up to the joke-teller to determine if a joke is offensive or not. It either offends a group, or it does not.
You're right, Adam just made a silly joke. You see it as a silly joke. However, and this is the point, now that you've been educated to the fact that the joke was offensive, what is your response?
Your reaction, that they should not have been offended, is unreasonable, because the joke was not at your expense. Would you become the aribter for racial jokes? Native American jokes? How about child pornography jokes? Religious jokes? Why then jokes about a minority gender group?
I suspect, and I mean this with respect, we could find some sensitive area in your life, or anyone's life which would be "just a funny joke" to some, but which are deeply offensive to others. Yes, we live in a "politically correct" world, but there are still lines as to what is ok, and what is not.
And the receiver is the one that determines those lines, not the sender.