There are two ways Mongolians flirt:
There's “overt” and there's “super covert.”
Overt: wave your sashes.
Covert: bat your lashes
Alone, in the dark, in your yurt.

Based on the suggestion: “flirt"

A rabbit once courted a heifer.
To his pleas, though, she couldn't be deafer.
She told him, “You're nice,
“But you lack certain spice.”
So he made of himself hasenpfeffer.

Based on the suggestion: “hasenpfeffer”

I only knew the word “hasenpfeffer” from the Laverne & Shirley theme song. But research has shown me that it's a German stew of rabbit (hase) with pepper (pfeffer) and other spices.

“But Sherlock, how on earth could you know
“Who embezzled? And where did it go?”
“It's the priest. He'd no qualms
“Turning stock shares to alms.
“Eleemosynary, Watson. Let's go.”

Based on the suggestion: “Eleemosynary” 

eleemosynary, adj. of, relating to, or dependent on charity; charitable

When eating a Belgian-style waffle
You should know it's completely unlaffle
To fill all the hollows
With paste made of swallows.
(And not only that, it tastes affle.)

Based on the suggestion: “waffle"

A bottle, created by Klein,
Caused a fuss on both banks of the Rhine.
This miraculous flask
Spurred the people to ask,
“Can you do the same thing with a stein?”

Based on the suggestion: “Klein bottle”

Alas, somebody got to this joke before me. This is a real-life Klein stein containing wine (rosé), purchasable at www.kleinbottle.com.

 

It is odd that a fungus-y truffle
Should beget such excessive kerfuffle.
Some folks hail it as “lusty,”
Others gripe that it's “fusty.”
Either way, it sets feathers to ruffle.

Based on the suggestion: “kerfuffle"

A whelk is a seagoing snail
With two flippers, a fin, and a tail.
It can breathe through a hole
In the top of its skull,
And it... hang on, I think that's a whale.

Based on the suggestion: “whelk”