Oh, I know. My sister was batshit during her pregnancies, especially the first one. But I've known a few who weren't, too. It's kind of like the PMS cliche for me. Like, I'm a wreck on my period, so in my case the cliche is accurate, but it isn't for everyone. And when women make jokes about either thing, I laugh, but I get scrunchy-faced over it sometimes when the joke comes from a man.