Actually, they DID teach us that in Sunday school. Further, they made it clear that Onan's sin wasn't masturbation (as is commonly, mistakenly believed,) nor even about withdrawal per se. My Sunday school teacher was quite clear that Onan's crime was about dereliction of duty.
The sin of Onan, who in the Old Testament was censured for spilling his seed; and the Roman Catholic church still officially condemns masturbation as a mortal sin.
It seems the seed is supposed to go into making another christain, not to spill it all over the ground.
I am safe, I only spilled it in the bed, wail Jesus sits by my bedside. Lol
The whole of Genesis 38 is pretty fucked up, full of sexual intrigue and provided the world with the word Adultery after the city of Adulla wherein all of these incestuous shenanigans where perpetrated.
So no it never does get taught in Sunday school.
That is incest and against masterbation.
I don't know anyone who has sex with their brother's wife. Maybe there is a Christian website for that.
Plus 98% of us guys masterbate and 2% are lying about it. You are allowed to jeck off to Jesus, according to jerking for Jesus website
Nobody wins in bibleland, somebody's going to hell for this, for sure..