It's not exactly great humor, but I'm confused as to why this is offensive to women specifically (let alone an axiom of sexism). Because it references male organs? They're not referring to females at all. Not to be too reductionist, but that leaves me thinking of two possible conclusions:

1. women are too delicate to handle any references to anatomy

or

2. the "jokes" were simply crude and, while off-putting to anyone with a developed sense of humor, nothing to write (tweet?) home about with regards to being offensive