why so many nasty gory dirty movies

Why do you think Movie companies feels it is necessary to cram so much blood and gore and nudity into movies? I mean if you look at the top movies when a "famliy friendly" film comes out that mocie is generally at the top of the list. If most people are like us we go to the movies together and I really hate having to wait weeks to see something the whole family can enjoy without seeing a naked butt or someone get their head cut off or eye gouged out. Am I the only one out there that feels this way