Earlier quoted context omitted.
This feminist wiki says, "Any form of 'fuck' that assumes penetration is a bad thing for the receptive partner" is misogynist[1]. So I guess something like "Yeah, they really fucked us over on that one." could have been what he said, and it would be misogynistic and thus makes sense to be something that shouldn't be said around women especially. The next step is to eliminate saying it around men too, because misogyny…
That seems like a bit of a strawman and overgeneralization. I personally think offense over "fuck", "fork", or "dongle" is absurd (beyond typical professionalism/politeness standards), but this is one branch of feminism finding "fuck" offensive, and in the "dongle" incident, one single woman who found it offensive at the time. Obviously not all women find these things offensive. Not all people (women or otherwise) us…
On the other hand, the OP herself is in the gray (for now at least) for saying dick jokes are fine and the only sexism there is the lack of vulva jokes.[1]
The fact that there is no rulebook was exactly my point. For every person wanting to analyze whether your anatomical/sexual reference is offensive to someone, there is someone else feeling singled out that you would take that care before saying it in front of them. I don't want to throw up my hands and give up, just point out that people act like the answers are easy but it's actually very complex. There's little consensus on proper behavior on these small scales, and both sides have tribal and exclusionary behaviors.
Behavior of today's college students, in the US at least, suggests the Tumblr generation is growing and therefore a sizable contingent of people really will increasingly apply these standards to everyone else.
[1] https://news.ycombinator.com/item?id=10760819 (you have to go up to parent to see the grayness, and I'm assuming it's the OP because she claimed so in another comment and has a sufficiently-aged account with the same name as the website)