Well, alas, for some of us (and I refer to myself, of course), the sense of humor hasn’t progressed much past age fourteen. But in my own defense, the oldest recorded joke ever found is a fart joke, so if my sense of humor is puerile, it has at least the weight of history behind it.
Yes, I take your point. What I meant was that with sex or scatology, being humorous without being offensive is difficult; it’s a fine line between “funny” and “creepy”, and some are better than others at dancing on it. Our recent focus on controlling misogyny has made the social cost of crossing that line higher, which I suspect discourages attempts at blue humor. It’s still possible, of course - witness @Master_Wang-Ka’s wonderful tale of a colonoscopy that took an unexpected bent.
But in general, I think less-gifted Dopers are more wary of posting potentially-offensive comments. And as I said, if that makes female posters more comfortable here, that’s a fair trade.