Because these 'pretty little angels' are going to universities to make something of themselves. Why would a girl with looks and a brain waste their time doing sex work in this day and age? You say that the decent punter will pay well and show respect. That's true. But the truth is, sex work is dangerous and unpleasant for most people and generally speaking, a last resort. Though I agree with you about the old ducks. Anyone can be a 21 year old Angel with dd's on the net now, and these old clams are taking advantage of this.