Masturbation brings self gratification. Wherefore they are no more twain, but one flesh. Masturbation does not promote the one flesh relationship between a husband and wife. Sexual desires for the opposite sex are natural. Often masturbation and homosexuality or sodomy are linked.
Masturbation seems to fit here.
We are to flee youthful lust. Masturbation is often tied to youthful lusts. We are not to have control over our own body in marriage. Masturbation is having power over one's own body. It is not uncommon that when a fetish is used in masturbation, that it may be required in marriage.