Imagist
Worshipper of Athe.
The Roman Catholic church and a few other denominations have strong stances against birth control. Even assuming that life begins at conception rather than implantation or birth (which is biologically spurious), methods such as condoms do not even allow conception to occur.
There are two arguments I have seen, both of which are obviously silly:
1. Procreation is the primary purpose of sex.
So what? Gripping objects against the other fingers is the primary purpose of using one's thumbs. Is it then wrong to use the thumb for pressing motions such as pressing down on one's space bar?
2. Onan pulled out and God killed him (Genesis 38:8-10).
At the time society did not allow women to take care of themselves, so it was the responsibility of a man to impregnate his brother's widow with a son if his brother died, so that the son could inherit the brother's property and take care of the brother's wife. Onan didn't do this, because he wanted his brother's property for himself (or maybe for his own son, since the son conceived with his brother's wife would be considered his brother's son).
So yes, in that very specific circumstance, what Onan did was wrong. But this has no bearing whatsoever on the modern day where sleeping with your brother's widow is not only non-obligatory, but a little weird.
There are two arguments I have seen, both of which are obviously silly:
1. Procreation is the primary purpose of sex.
So what? Gripping objects against the other fingers is the primary purpose of using one's thumbs. Is it then wrong to use the thumb for pressing motions such as pressing down on one's space bar?
2. Onan pulled out and God killed him (Genesis 38:8-10).
At the time society did not allow women to take care of themselves, so it was the responsibility of a man to impregnate his brother's widow with a son if his brother died, so that the son could inherit the brother's property and take care of the brother's wife. Onan didn't do this, because he wanted his brother's property for himself (or maybe for his own son, since the son conceived with his brother's wife would be considered his brother's son).
So yes, in that very specific circumstance, what Onan did was wrong. But this has no bearing whatsoever on the modern day where sleeping with your brother's widow is not only non-obligatory, but a little weird.