"Biblical account - After Onan's brother Er died, his father Judah told him to fulfill his duty to his brother by entering into a levirate marriage with his brother's widow Tamar to give her offspring. Religion professor Tikva Frymer-Kensky has pointed out the economic repercussions of a levirate marriage: any son born to Tamar would be deemed the heir of the deceased Er, and able to claim the firstborn's double share of inheritance. However, if Er were childless, or only had daughters, Onan would have inherited as the oldest surviving son. When Onan had sex with Tamar, he withdrew before his orgasm[4] and "spilled his seed [or semen] on the ground", since any child born would not legally be considered his heir.[5] The next statement in the Turah says that Onan did evil and the Creator slew him. Genesis 38 gives the full account".
THE REAL SIN IS SPILLING OR WASTING THE SEED BECAUSE IT HAS LIFE. MASTURBATION IS THE ACT THAT PRODUCES THE SIN. IT IS VERY CUNNING AND EXCITING TO SEE JUST WHAT TAMAR DOES NEXT, TO CLAIM HER RIGHTS. MOST INTERESTING !!
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