It’s like their religion or something

Sanhedrin 55b

A maiden aged three years and a day may be acquired in marriage by coition, and if her deceased husband's brother cohabits with her, she becomes his.

http://www.come-and-hear.com/sanhedrin/sanhedrin_55.html

https://www.sefaria.org/Sanhedrin.55b?lang=bi

Sanhedrin 54b

Pederasty with a child below nine years of age is not deemed as pederasty with a child above that.

https://halakhah.com/sanhedrin/sanhedrin_54.html

https://www.sefaria.org/Sanhedrin.54b?lang=bi

Ketubot 11b

When a grown-up man has intercourse with a little girl it is nothing, for when the girl is less than this, it is as if one puts the finger into the eye

http://www.come-and-hear.com/kethuboth/kethuboth_11.html

https://www.sefaria.org/Ketubot.11b?lang=bi