2009-09-25T10:18:30-05:00 GCI info@gospel.com /feeds/topics/spilled+his+semen+on+the+ground/ http://biblegateway.com/passage/?search=Genesis%2038:8-10&version=NIV 2009-09-25T10:18:30-05:00 Onan was told by Judah to produce an offspring for his brother. Since Onan didn't want to do this, he practiced a primitive form of birth control with his brother's wife. He was put to death because of he didn't fulfill his duty as a brother.