Among the most commonly used metaphors are the bases describing levels of physical intimacy (generally from a heterosexual perspective).
Definitions vary, but the following are typical usages of the terms: The metaphors are found variously in popular American culture, with one well-known example in the Meat Loaf song "Paradise by the Dashboard Light", which describes a young couple "making out", with a voice-over commentary, by baseball announcer Phil Rizzuto, of a portion of a baseball game as a metaphor for the couple's activities.
And if anyone can find the origin of “putt from the rough,” for the love of all things holy, put it in the comments.
While in sports, this is normally a good thing, meaning you scored. How this became a metaphor for gay sex is beyond comprehension. You would likely hear this when the commentators are mentioning the weaknesses of the netminders. Well we would hope you would never hear this, but it may find its way on some sort of a “porno bloopers” video.
When she mentioned they'd gone to second base, we all had different ideas about what it involved.
Second Base: Rounding second involves copping a feel. If it were up to me, I'd include the whole feeling up business in first base.
Sports, aside from the world of construction, probably has more clichés and vocab that lend themselves to double entendre than any other occupation in the world.
Sex and sports share many common themes, those of conquest, heartbreak, ambition, and a whole lot of sweat.
There's the term "score", which may not mean a "homerun" in the baseball metaphor, as one can just score digits, kisses, a date, or sex acts other than PIV sex.
And if you don't mind another baseball one: There's "designated hitter" for the guy who takes the less attractive girl so you can be with the more attractive one. "Picking up a spare": having sex with someone after getting rebuffed when getting close last time.