No clue how this became such a big taboo in Abrahamic religion,
Iirc it’s about not “wasting” life essence.
Genesis 38:9-10: But Onan knew that the child would not be his; so whenever he slept with his brother’s wife, he spilled his semen on the ground to keep from providing offspring for his brother. What he did was wicked in the Lord’s sight; so the Lord put him to death also.
It’s that Monty Python Every Sperm is Sacred song, but unironically
I dunno that guy but I think Mao and Deng both said similar things. Fuckin hated the corn man. Allegedly Mao invited Kruschev to Beijing in 1958 to talk shop, but when Kruschev got there Mao was already vibin in the pool. Kruschev couldn’t swim but Mao refused to get out, so in goes Kruschev with his floaties on.