I always hear people say "I hit the third base" or "I hit the second base" (sex related). I am not 100% sure what they all mean.
Additionally, in one of the House MD episodes, there was a dialogue:
Dr. Wilson: How are things going with Cuddy?
House: Great. We've gotten to fifth base. That's two home runs, and then she gives me back a triple.
In one of the American Dad episodes, I remember Steve saying something along the lines, "did I just hit the second base?" after holding hands with a girl.
One of the other answers has provided a nice link to the Wikipedia entry for baseball metaphors for sex. There are, as the top comment on this question notes, four bases in baseball, and these have corresponding sex acts associated with them.
The sexual contact associated with each base has evolved dramatically since I was a teenager, although "home base" or "home run" has always meant intercourse, and "first base" has always meant kissing or snogging.
To use the expression correctly, you get or make it to a base, per my comment:
I got to second base with that girl yesterday.
I didn't think I had a chance, but I made it to third base with her last night.
You don't use "hit" with "bases," but you can use the baseball terms that correspond to hits:
I hit a triple when I took her home last night.
means to get to third base. It's double for second base, single for first base.
You can also "score," which is the same as hit a home run or get to home base.
About the House quotation, if I interpret it correctly, they had intravaginal sex twice and then she performed oral sex on him. If we say home base = fourth base, that's 4 + 4 − 3 = 5, the subtraction because he was receiving instead of giving. But this is a joke, and probably not intended to be analyzed too closely.
And here's another handy diagram.
scroll thingy on that apple mouse but not the nipple/g-spot on the IBM laptops?
Commented
Mar 11, 2019 at 0:29
Here's a diagram that may help you visualize it. (Sorry, no XXX rating here.)
Although this wasn't what "House" referred to, Urban Dictionary lists fifth base as anal sex.
Talking about fifth base when there's really only four bases reminds me of the expression UpToEleven.
If you want to downvote me for using Urban Dictionary, that's fine. If I could, I'd downvote myself!
From examiner.com:
First base When you get to first base, you have been lucky enough to have been kissed. Some people only consider French kissing as getting to first base.
Second base is direct physical contact, usually meaning his hands to her breast. It also includes other forms of petting, touching and groping.
Third base may include manual or oral sex for either partner.
Home run Simply put, a home run is sexual intercourse
Grand slam Those looking to excel at sexual baseball strive for the grand slam. A grand slam is sexual intercourse with the female having an orgasm.
Balk A balk is premature ejaculation. Some also refer to this as a ball.
Strike out A strike out is when you don't get a kiss at the end of the evening.
Double header A double header consists of two rounds of intercourse in one night.
Sacrifice fly A sacrifice fly is the buddy who "takes one for the team" to ensure you end up with the girl of your choice for the evening, akin to a "wingman."
Picked off When your sexual activity is interrupted by a third party (such as a parent, roommate or child), you are said to have been picked off.
Walk A walk is considered a sympathy base and is typically reserved for first base only. It occurs when your date allows kissing even though they are not attracted to you.
This is called Baseball metaphors for sex
There's normally no fifth base, and House was actually playing with the terms. He explains this by saying "That's two home runs, and then she gives me back a triple."
Home run is defined:
Home run (Fourth base) is the act of penetrative intercourse.
Edit: Triple, I think, refers to getting to the third base, The third base refers to:
Third base is oral stimulation of the genitalia.
