to engage in sexual intercoursewere both in the mood to do it
were both in the mood to do it
breeding, copulating, mating, sleeping
fooling around, fornicating
having sex
英语同义词词典收录了63618条英语词条,基本涵盖了全部常用同义词或反义词的辨析及翻译,是英语学习的有利工具。