“20 bucks, same as in town.” It had to be said. 
It wasn’t a sex question, but Pepper Mill and I were shocked when we were in the supermarket with a circa 10 year old MilliCal and she declared that she wanted Cosmic Brownies.
“Cosmic Brownies”, for those of you who missed the sixties (or the reruns) was the term for marijuana-laced dessert food. It was simultaneously the cause and the cure for The Munchies.
Pepper Mill and I looked at each other wondering How did our little girl learn this term?
we were surprised to learn that Little Debbie manufactured a line of (drug-free) snacks called “Cosmic Brownies”, hoping to cash in on the name, nostaliguia, and notoriety, no doubt:
so maybe when your kid asks about a Blowjob or Sex of the Beach, they’re only asking about an alcoholic drink.
I do think some people like to do that. Seems like it would be fun to me, and I’ve seen guys do it.
But, regardless, it doesn’t matter. It’s a generic term, as far as I can tell. While the context there is on breasts, you can do it to any body part, including a child’s belly.
Maybe I’m wrong, but that’s how I always took it.
And in response to some other posts, I’d rather tell my kid about abortion than to have them look it up online and see the gross pics or read some of the nasty stuff said in debates. Fortunately, I’m not a parent, so I don’t have to figure out an age appropriate way to do that.
The first time I encountered the word ‘‘gang bang’’ was an old Mad Magazine from the 70s and it clearly implied rape (IIRC it was skewering that scene from The Deep where all the ‘‘native’’ black guys went after the white woman.) I assumed for a while that it always meant rape until I saw it repeatedly used in contexts that were obviously not rape.
Google ‘‘gang bang’’ and you will find a lot of porn featuring apparently eager women having sex with a bunch of men.
As for me, I remember when I was five or six years old asking my mother if sex was illegal. It was always discussed in such hush-hush terms around me, I had to assume it wasn’t allowed (for everyone, not just me.) Her response was, ''How do you think I got you?" She’d already explained reproduction to me, I just never made the connection between reproduction and this supposedly fun thing called sex. I said, ‘‘Oh,’’ and that was that.
I also remember asking her what ‘‘rape’’ was. I must have been quite young, because I remember the answer being something like, ‘‘When a man pushes around a woman and is mean to her,’’ and because rape sounds so much like scrape I had this image in my head of a guy dragging a woman around on the pavement. A violent crime, no doubt, but it didn’t give much insight into why people were so weird about the subject. Let’s just say her answer didn’t clarify much.
Reported because I’m not clear on the rules for that kind of post.
I will reiterate that it is possible that the child is not asking a “sex question”, instead they may be asking a vocabulary question. Which I why I suggest asking back, “what do you think that word means?”