Which are the formal and the informal words for these parts? (My dictionary gives me lots of words but I don't know which are the most frequently used ones and if they are polite or not)
Penis = 페니스 / 음경 / 남근 / 고추
Testicles = 고환 / 정소 / 불알
Vulva = 외음부 / 음문 / 보지
Butt = 엉덩이 / 궁댕이 / 궁둥이 / 궁디
Anus = 항문 / 똥꼬 / 똥구멍
I would thank if you could tell me which one is used most in formal speaking and in informal (vulgar) speaking.