What does the Bible say about self-gratification / self-pleasure?

What does the Bible say about self-gratification? What does the Bible say about self-pleasure? Are self-gratification and self-pleasure always sinful?

Masturbation—is it a sin according to the Bible?

What does the Bible say about masturbation? Is it a sin to

Does the Bible say anything against self gratification? - Quora

Masturbation—is it a sin according to the Bible?

What does the Bible say about self-pleasure? - Quora

What does Christianity have to say about self-stimulation? - Quora

Masturbation—is it a sin according to the Bible?

What does the Bible say about masturbation? Is it a sin to

Titus 3:3 Commentary

What does the Bible say about masturbation? Is it a sin to