I used to have a beta who changed "come" to "cum" in my sex scenes ALL THE TIME. And now matter how many times I told her to just leave it be, she just kept changing it, insisting it was the correct spelling.

It doesn't irk me as much when describing seminal fluids (though I wonder how you could make that sexy... "She had cum all over her face"? Ew ew ew), but when it describes the act of climaxing it just rubs me all the wrong ways.