This isn't a euphemism. Far bloody from it. I comes from the old Anglic (precursor of Anglo-Saxon) meaning hole in a hedge. There's no doubt what's being talked about here.

Of course, a lot of us use it in other connotations. As in: "The Raiders are ducked again this year"

"I called in sick three times this week, my boss is pissed. I'm ducked."

slightly vulgar, but an expressive and accurate description of hot, sweaty sex.

What word is that? Pluck? Snuck? Tuck?

Simple, straight to the point!

Almost always in ref. to casual sex without strings/emotions. I wouldn't partake, but it's a word I would use.

That could be confusing to some people. I don't know who but some people.

I always heard that this infamous word meant Fornication Under Consent of the King, meaning that a king gave his nobles permission to screw outside of marraige.

Good ol Anglo-Saxon standby-but it will offend some people.

Unequivocal. Direct. Concise. Versatile. An Anglo-Saxon relic which has served its purpose for thousands of years, its very utterance a hymn to free speech. The scourge of prudes and sophisticated people, the lingua franca of the middle-class and the rallying cry of the working-class. In many ways the ultimate English-language word.

Might be a useful word but it's about as far away from being a euphemism as you could get.

Works great during sex and when I hit my thumb with the hammer.

Ah. One of the most versatile words in the English language. However, I rarely use it, or hear anyone else use it, to refer to the act of copulation, though it happens occasionally.

The best!