How to deal with female egoism?
First of all, recognize the problem, because admitting it to yourself is hard. Further, it is important to constantly work on yourself - learn to track your selfish desires and respect the opinion of your partner.
What else to do to eradicate selfishness in a relationship:
• Eliminate manipulation and blackmail. If you ask for something, do it gently and be prepared to be rejected.
• Realize that your partner has their own needs and desires, and they may not be the same as yours.
• Learn to negotiate, compromise, control your ego.
If you are not an egoist, but a loved one, often remind him that you have your own desires, needs and feelings. You also need care, attention.