I would suggest that maybe you speak to a sex therapist or a counselor if it is affecting how you feel about yourself However, excess masturbation may make it more difficult to have an orgasm when he is with a woman, fade is also correct about orgasm and ejaculation being separate The worst thing we can do to ourselves is to deny your feelings and maybe through some therapy you can get the real answers.
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This does not mean that masturbation will be more enjoyable than sex with a woman who a man has feelings for