Don't let that hot guy slip away just because you can't up your game. There are many dirty pick-up lines out there you can use to stimulate a guy's imagination.
So learn to pick the best lines for the moment. However, remember that not all dirty pick-up lines for guys can be appropriate. Therefore, if you fall for him, don't wait, go ahead and throw in some lines.
Sometimes when you like a guy, he may not be aware of your feelings.
But we're in the 21st century, and many customs are changing. Many people tend to think that it's a guy's job to initiate every move on his lady. Using dirty pick-up lines on your guy is one of the best ways to charm him.