I like my "Lisa" to make me laugh by talking dirty. I am not a prude, and I don't want my "Hal" to be a prude, either. It does not always have to pertain to sex, but the naughty words that kids are not supposed to say.
I keep the original brain, and make a copy, and name it "Dirty".
Then, if I want to carry a clean conversation, I can switch back to the other brain, like when other people are around, lol.