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”)

(informal) the lady doth protest too much; a girl's protests should not necessarily be taken at face value.

(lit. one eye, two legs/feet, three courage, four power) "first, eyes, second, feet, third, courage, fourth, power". The essentials of [kendo] in descending order of importance