Fellatio is the formal, almost medical name for using the mouth — lips and tongue — on a man’s penis to give sexual pleasure. English borrowed it from Latin; doctors and law books were using it in the 1800s, still half as a Latin word.

Fellatio is the formal, almost medical name forfellatio是比較正式、近乎醫學用語的說法，指 using the mouth — lips and tongue用嘴巴——嘴唇和舌頭 on a man's penis對男性的陰莖 to give sexual pleasure給予性快感。English borrowed it from Latin英文是從拉丁文借來的；doctors and law books were using it in the 1800s十九世紀時，醫生和法律文書就在用這個字，still half as a Latin word當時還有一半像是拉丁文

Everyday English has blunter words (blow job is the common informal one). People do not say fellatio at the dinner table; they say it in textbooks, clinics, and careful writing.

Everyday English has blunter words日常英文有更直白的說法（blow job is the common informal oneblow job就是常見的口語講法）。People do not say fellatio at the dinner table大家不會在飯桌上說fellatio；they say it in textbooks, clinics, and careful writing他們會在教科書、診所和謹慎的寫作裡用這個詞

Strictly, the word is about a man on the receiving side. Oral sex on a woman is a different word. In loose talk some people bundle both under oral sex; this old Latin word does not.

Strictly嚴格來說，the word is about a man on the receiving side這個字指的是男性是接受的那一方。Oral sex on a woman對女性做口交 is a different word用的是不同的詞。In loose talk some people bundle both under oral sex在比較隨便的說法裡，有些人會把兩者都算進oral sex；this old Latin word does not但這個古老的拉丁字不會這樣

This is adult language. It is not a swear, but it is not small talk either, unless the lesson is the body or health.

This is adult language這是成人用語。It is not a swear這不是髒話，but it is not small talk either但也不是閒聊會講的話，unless the lesson is the body or health除非課程主題是身體或健康