Definition
To engage in sexual intercourse, typically after a period of kissing and physical intimacy.
（尤指在经过亲吻和爱抚等前戏之后）发生性行为。
They decided to go all the way after dating for three months.
他们约会三个月后决定发生性行为。
I don’t think she’s ready to go all the way.
我不认为她已经准备好发生性行为。
Did they go all the way on their first date?
他们第一次约会时发生性行为了吗？