A stock phrase in Japanese pop culture supposedly used by the wife in a newly-wed couple to invite her new husband to bed.

Kyūjitai form of 私生児 (“illegitimate child”)

I don't speak Japanese

I'm a Muslim

I'm Jewish

Kyūjitai form of 磨穿鉄硯 (“showing unyielding diligence in one's studies”)

showing unyielding diligence in one's studies; wearing a hole through one's metal inkstone from constant studying