Liculius posted:
"And Judah said unto Onan, Go in unto thy brother's wife, and marry her, and raise up seed to thy brother.
9 And Onan knew that the seed should not be his; and it came to pass, when he went in unto his brother's wife, that he spilled it on the ground, lest that he should give seed to his brother.
10 And the thing which he did displeased the LORD: wherefore he slew him also." Genesis 38:8
I'm not saying that masturbation is right, but this passage in Genesus 38 has nothing to do with masturbation. Onan was killed because he refused to help carry on his brother's geneology. It was disobedience to God.