I've reached this part: "Again, the men who are needy and have poor self-esteem are the ones who are willing to completely alter their personalities in order to seduce any woman. The first step to being more attractive is to see rejection as a means to eliminate women who won't make you happy from your life. It's a blessing, not a curse."

I'm having difficulties understanding the meaning of this completely.

Let's say I like both pasta, and pizza. I have a dinner date, and the girl likes/prefers pizza. I would (unless I really want pasta ) choose pizza.

Or I both like jokes about dead babies, and about blondes. She gets offended by the dead baby jokes, I wouldn't tell them in her vicinity - out of respect for other people.

Is this the issue, or is it only an issue when you do stuff that you do not like, and pretend to like it?

Any with experience in this field care to elaborate?