“The voluntary spilling of semen outside of intercourse between man and woman is a monstrous thing. Deliberately to withdraw from coitus in order that semen may fall on the ground is doubly monstrous. For this is to extinguish the hope of the race and to kill before he is born the hoped-for offspring.” — John Calvin
I can’t argue with that. I can’t even say I find it to be offensive language. Maybe not words we say in “polite company” but it is Biblical truth.