What's with all the penis abuse in movies these days?

Ok, I'm a guy, and I've had my share of guffaws to a good penis joke or a well-timed blow to the nuts on screen here or there, but it seems lately that things have just gotten extreme and way out of hand. It's getting to the point where it's becoming something of a standard in movies for mature audiences, for Mr Willy to be humiliated, beaten, kicked, electrocuted, twisted, sliced, mangled, torn, shot, or (in the case of this movie and others) bitten off. I'm not talking about fringe cinema, extreme stuff has always happened there - I'm talking about mainstream movies. What's the deal here? I realize that most of these films are written and produced by men - do these guys hate their manhood so much that they want to defile and destroy it onscreen? Sure, there are contexts where it makes sense, or is even justified, but I think we've gone well beyond that and turned it into a twisted form of entertainment. I don't think women would stand for it if vaginas were routinely being shot, lacerated, impaled, sliced, burned etc with the same abandon. Yes, I know that has been depicted in movies before - and those movies are swiftly labeled as sick and mysogynistic - but these days it seems that it's all about Death to the Penis. What's going on?

"What happens to us in the future? Do we become @ssholes or something?"
- Marty McFly