Give enough complements to someone, and they'll go to bed with you
That's the way it used to be – and possibly, the way it will remain. Compliments will get you about anything. This also makes a lot of sense. You know the golden rules of a good compliment? First, it has to be addressed to the person you want to be in bed with; second, it has to be positive and reveal something the addressee was not aware of prior to hearing the compliment. And that's it, the ready recipe for the best compliment. Therefore, if you are going to complement someone into bed, you better prepare an extensive and thoughtful list in advance.
This method, taken out of context, can do more harm than good, so caution has to be exercised. The characters don't hint things you should say or do. However, the optimal strategy seems to be: 1) approaching the object of desire; 2) repeating again and again "I praise your appearance" and "I flatter you." Good luck! You'll end up in a lunatic asylum before you seduce someone. Compliments should be chosen carefully and done at the right moments, they also need to be separated with other activities, such as conversations about daily activities performed.
Remember – even the best compliment (no matter if properly separated with other questions) won't make anyone love you. The "Woohoo" must be preceded by a conscious decision on both sides.