and had sex with her , it wasn't for her sake but rather for his pleasure. goddamn.

dude it wasn't. the fact that onan was using his brother's wife as a sex doll instead of giving her a child which was what God said he should do. he continued having sex with her but his pride didn't let her have the children. therefore the sin was that even though he took her into his home

scourge gender envy hitting me so hard