“Wannawannawanna fuck?”
“Remember what we used to… nevermind…”
Aha, another fan! That phrase works for more intense sessions I suppose - or any sex in the summer. 
We don’t have a phrase. We communicate intense desire through raised eyebrows. Really.
“Hot Monkey Sex”?
It makes me think of; “There’s the Devil to Sex, and no MOnkey Hot.”
Wanna Poke? (from Lonesome Dove)
Nap time - preceeded with a warning to kidlets that they must be bleeding profusely before approaching our door or have appendages hanging at unnatural angles.
Wanna play tent?
I want you - NOW
We call it “Ungawa” sometimes.
For a quickie, we say, “let’s tear one off.”
Make Flippy Floppy.
We also get jiggy.
“Want to have sex?”
OK, so we’re a bit boring…
Barry
“I feel some stormy weather coming on”… (long story behind it, but has to do with rain being a euphemism for masturbation)
“I wanna fuck you RIGHT NOW” (nothing if not direct)
“You’ve been bad! Go to my room!”
Well ours came from hinting around on company email where clearly you don’t want your meaning to be discerned.
So I was suggesting we get together that night for the act, and I called it cake.
The name caught on for us and now we use it to describe a variety of those sorts of activities – solo would be a snack cake, you can have devil’s food cake, cake with lots of icing, plain cake, cake with ice cream – well I think you get the idea.
IMR. It stands for intimate marital relations. “Hey, honey! IMR tonight?” If I’m not into it and he is (fairly often) I will let him “be a spoiled brat” which means I will do a little something for him that doesn’t take very long.
I call it “getting busy” and she calls it “get over here and hump me”.
Well we used to “sleep” together and then it changed to “have sex” I was very happy when we started calling it “making love” …sort of mirrored the changes in our relationship.
In the Music Man the Harold Hill and Marcellus are in the livery stable talking about what they are going to do that night. Hill replies to Marcellus that he’s, “not thinking about food.” Then Marcellus has the line, “Gonna line yourself up a little kanoodling, eh?”
That’s ours.
Kanoodling.
In front of others the euphemism is usually “couple time” as opposed to family time.
My wife and I also use “snugglebunnies” though she often shortens it to “snugglin’” and I tend to lengthen it to “snuggle some bunnies” or “SnuggleMcBunnies”(a sort of variation of EggMcMuffins-which,in and of itself,sounds like a euphemism for cunnilingus).
fuck
best when whispered in the ear
We sometimes say “lets play”.
Personally when I use the phrase “where is the rope”, my wife knows that sex is on the way.
I had a friend who wasn’t very into sex. Her boyfriend would say, “Honey, let’s make nookie.” and she’d say, “Babe, I don’t feel like making cookies right now.” Makin’ cookies. Heh.
We “make sex”, as in, “I’m gonna make sex on you now.”
Oh, I almost forgot, our polite version said around other people is “quality time.”
Usually sex in our house begins with me saying,
pleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleaseplease