What is the origin of the idiom "get to first base with something" and when to use it?

The idiom "get to first base with something" originated from the sport of baseball. The first base is the starting point, and a player must reach it in order to advance to the next bases. If a player reaches all four bases and returns to home plate, they score a run for their team. It is an idiom often used to describe initial progress or success in a project or endeavor.

What is the origin of the idiom "get to the first base with someone" and when to use it?

The phrase "get to the first base with someone" comes from the sport of baseball, where "first base" is the initial stage of a player's progress around the bases to score a run. In a romantic sense, "get to the first base with someone" means achieving the first level of physical intimacy. It refers to kissing someone on the lips, signaling the start of a more intimate relationship. The phrase is often used in a playful or colloquial manner to describe the act of kissing someone romantically. It implies a progression from initial attraction or interest to a more physically intimate interaction. The phrase "get to the first base with someone" is somewhat old-fashioned. It originated in the mid-20th century and was more commonly used in earlier decades. While it may still be understood, it is not as commonly used in modern conversation, especially among younger generations.