French Sex vocabulary and expressions are used all the time in movies. Books don't cover this topic but I think it will be very helpful to adult students to understand French Sex Vocabulary, and know which words NOT to use to avoid huge faux-pas.
法语性爱词汇和表达式一直都会出现在电影中，书上并没有涉及到这个话题，但是我认为这对成年学生理解法语性爱词汇很有用，而且他们还可以懂得哪些词不能用以避免大大的误会。

How to Say to Have Sex and to Make Love in French?
法语中怎么说发生关系/造爱呢？
The commonly used expression is “faire l’amour”, which translates perfectly into “to make love”. There are tons of vulgar expressions about it, the most common one being “baiser” used as a verb. This means to fuck, in the physical way as well as the mental one, just like ‘to get screwed’. In that case, it is mostly used in the reflexive form: “se faire baiser”.
一般都会说“faire l’amour”，直译过来的“to make love”。还有很多通俗的表达方法，最常见的是动词“baiser”。这个就是做的意思，身体上和精神上都是，就像“to get screwed”，在那种情况下，大部分情况下用作反身形式：“se faire baiser”。

“Voulez-vous Coucher Avec Moi Ce Soir” = Would You Like To Have Sex With Me Tonight?
“您今晚想和我上床么”？
“Coucher avec quelqu’un”和某人一起上床= to have sex with someone和某人发生关系
“Dormir avec quelqu’un”和某人一起睡= to sleep with someone in the same bed和某人睡一张床

French Synonyms For Having Sex – More or Less Vulgar
发生关系的法语同义词—或多或少通俗点儿（法国人常用的）
“S’envoyer en l’air” = literally to send yourself in the air. Common.字面意思是把自己送到空中。常见
“Faire des galipettes” = to do somersaults. Cute.翻筋斗。可爱
“Tirer un/son coup” = lit: to shoot a blow. Vulgar.攻击一下。通俗
“Copuler, s’accoupler” = to copulate. Scientific.交配。科学
“Faire crac-crac” = to do “crac crac” (sound) – Cute.去“克拉克 克拉克”一下（拟声词）—可爱
“Forniquer “= to fornicate. Old fashioned.私通。旧时流行
“Connaître” = to know sexually. Religious.性交流。宗教
“Niquer” = to fuck. Vulgar.做爱。通俗
“Sauter” = to jump but in context meaning to fuck. Vulgar.跳，暗含着做爱的意思。通俗
“Avoir une relation sexuelle” = to have sexual intercourse. Descriptive?发生性关系。描述性的？