How does a man pleases his woman sexually?

First of all start by asking her what she likes, and if she is to afraid to express herself, oral pleasure always works. If you can stimulate her clitoris, you are pleasing her, if that doesn't work maybe you are not the one. You have to make sure you both are comfortable with each other and if you are you should not have any problems experimenting with what pleases you both this makes a good relationship. ; )