Interrupted sexual intercourse or masturbation. In *Genesis 38, Onan was condemned for ‘spilling his seed on the ground’. Following this, most *rabbis condemn any form of contraception which creates a barrier to the seed and other methods...

In the Biblical Book of Genesis, Onan (Hebrew: אוֹנָן, Standard Onan Tiberian ʾװnān ; Strong) was the second son of Judah.[1] Certain interpretations of the narrative concerning him have led to the use of the term onanism to...