I was going to quote the Fifth Amendment, but I discovered that it only applies to criminal, not civil, cases.However, the whole Lewinsky scandal reeks of entrapment... certain factions of the Republican party were out to get Clinton from day one - a payback for Watergate, when
"them damn liberals" took down the most crooked president in American history.
They tried to do the same thing to Carter. Unfortunately, Carter turned out to be a better saint than a president. Clinton was a decent human being. Like all humans he made his fair share of mistakes - and the conservatives made sure to beat the hell out of EVERY mistake that he made, or could possibly have made.
As for the context question - he lied about something that had absolutely NOTHING to do about the case in which he was involved. A civil case does NOT give the prosecutors a license to ask anything they want.
Consider this :
Prosecuting attorney : "Mr. So and so, you're being sued because your dog barked at Mrs. Suehappy and scared her. So... how many times do you masturbate in a week?"
Mr. So and so : "Um, er, I don't."
Prosecuting attorney : "Really. So you don't masturbate? That's amazing. You have to get it out some other way... do you fuck sheep?"
Mr. So and so : "What? No!"
Prosecuting attorney : "Well, then, how do you get your sexual release, sir?"
Mr. So and so : "What does this have to do with anything?"
Prosecuting attorney : "Your honor, this line of questioning is necessary to show that Mr. So and so is a sexual deviant who molests his dog so that it will bark and people and scare them."
Judge : "Answer the question, Mr. So-and-so."
Mr. So-and-so : "Fine! I have sex with my wife, ok?"
Prosecuting attorney : "Ah! But here, Mr. So-and-so, is your wife's signed affidavit saying the two of you haven't had sex since your little accident five years ago!"
Mr. So-and-so : "WHAT THE HELL DOES ANY OF THIS HAVE TO DO WITH THIS CASE?"
Prosecuting attorney : "Folks, this is outrageous. Mr. So-and-so is a pervert and a perjurer! As good Americans, we must demand justice!!!"