When did guys stop making an effort?

When did it become acceptable for guys to hit on girls with a straight to the point "let's have sex"? The best part is when they respond to your "no" with a long story about how they're looking for a good girl to start a relationship with... REALLY?! How dumb do you think I am? You've not only insulted my integrity but now you've insulted my intelligence. I've never been one to want the princess treatment, but a little bit of effort would be nice. Save the cheap pick-up lines for the street walkers and strippers, they will never work on this girl.