Definition
to pleasure someone by orally stimulating their genitalia using the tongue and lips
為（某人）進行口交
In a private setting, they decided to engage in more intimate contact, including going down on each other.
在一個私密的環境中，他們決定進行更親密的接觸，包括為彼此口交。
She felt that after the romantic dinner, they could take things further and go down on him in bed.
她覺得在浪漫晚餐後，他們可以在床上更進一步，為他口交。
The lyrics of the song refer to intimate acts between lovers, such as going down on each other.
這首歌的歌詞提到了戀人之間的親密行為，例如為彼此口交。