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Agree, you always want more what you can’t take at any moment. Do not sleep with him when he wants, do not be afraid to refuse, sex should be ONLY by mutual desire If you have important things for you, do not cancel them for the sake of a man NEVER! Or he will understand that you are completely in his power (and this is very bad) Do not allow everything in sex at once, then he will "hunt" for what he wants. Whether it's anal sex or blowjob, it doesn't matter.