Cum: It's come.
Sperm: It's a complex mixture primarily composed of fluids, proteins, and sugars from the seminal vesicles and prostate.
Erotica: It's porn. Every attempt I've ever seen to differentiate sexual media into "erotica" and "porn" has always ended in the conclusion that "erotica is the porn that I happen to like." (Digression: I first encountered this distinction--and first realized its bullshittiness--when I was about twelve and the school library had a book of Gloria Steinem essays including "Erotica vs. Pornography." And I am not too proud to admit that being very young and her accounts of pornographic humiliations very detailed, I... I wanked to Gloria Steinem.) The word porn simply means media made and used for wanking and implies no evil; the word "erotica" is needless and judgmental fluff.
Kyriarchy: Kyriarchy is the hip new alternative to patriarchy--"kyriarchy" describes all the power differentials in the world, including male>female but also young>elderly, racial majority>minority, rich>poor, straight>gay, and so on. It's a word of victimhood and despair; it transforms areas where real advancement can be made into something huge and complex and unfathomable. It also has a tendency to conflate real injustice with inevitable inequalities--it's always gonna be better to be rich than poor, it doesn't have to be better to be straight than gay.
Prostituted woman: Yes, let's make it painfully linguistically apparent that we can't conceive of a prostitute doing it of her own will. Bonus points for using it to describe women who aren't actually prostitutes at all but are simply being sexual in some unapproved way.
Womyn: Oh for fuck's sake. You can't even use the letters in "the other side's" name? What are you, Crips and Bloods?
Va-jay-jay: You're not twelve.
Curvy/"Shaped like a woman"/Reubenesque/BBW/Bountiful/etc.: Fat. I'd rather say "I'm fat, and I can still be sexy" than "I'm not fat, that would be horrible, I'm just... curvy!"
Political lesbian: Sexuality is not political. Your sexuality lives in your dreams, your unwanted obsessions, the involuntary quivers and wetnesses of your loins--not in which gender you find to be morally superior. And it's rather trivializing of garden-variety lesbians; it's a cheap way to inject sanctimony into something you (hopefully) wanted to do anyway. "Oh, those suckers just date girls because they want to; I date girls because I'm fighting the good fight!"
Ecdysiast: I can't spell it.