His actual words were "I did not have sexual RELATIONS with that woman. As a lawyer he could later claim he only had sex and not relations. So his statement was truthful.....
So...to get sordidly detailed here: a BJ (or HJ) is sex, but not sexual relations as opposed to intercourse ? It would have been interesting to see if this same issue would have surfaced had the Dominic Strauss Kahn case gone to trial.
Yeah it's just something that happens more often then not with lying. Not a 100% in all cases of course. Looking to the left, itching nose, saying yes while shaking head back and forth. There are way more but off the top of my head I can't think of them. Body language is a big part of communication . Police know all these tricks.