You’re not allowed to cum anywhere except inside the vagina
I think that's in reference to the story of Onan. Current rhetoric is that this was God saying no to masturbation or sex for anything that couldn't make a baby. But the story in the bible is something like: Onan's brother was killed, God ordered Onan to immediately go to his dead brother's widow and knock her up, Onan tries but instead of following through on the order he pulls out (can't remember if Onan gets to explain why) and spills his seed on the ground, God gets angry at Onan and punishes him for not following through on a pretty fucked up order.
Most of that is interpretation after the fact.
I think that's in reference to the story of Onan. Current rhetoric is that this was God saying no to masturbation or sex for anything that couldn't make a baby. But the story in the bible is something like: Onan's brother was killed, God ordered Onan to immediately go to his dead brother's widow and knock her up, Onan tries but instead of following through on the order he pulls out (can't remember if Onan gets to explain why) and spills his seed on the ground, God gets angry at Onan and punishes him for not following through on a pretty fucked up order.
God, please keep your weird incest breeding fetish to yourself I’m begging