The Great California Laundry And Shower Meme, Explained

Last night I received the following peculiar tweet: Off-topic, but do you know if a new California law prohibits taking a shower and doing laundry on the same day? A lot of conservative sites are claiming that, but they’re not known for their factual accuracy. It just so happens that on Monday I took a shower and did a load of laundry. I’m pretty sure this is still legal, even here in the Golden State. But, um, what brought this up?