““Thumbtacks in your shoe are overkill, though. They're fine for super-macho super-spies for whom a punctured toe is a badge of honor. But if you ever need to beat a polygraph, just pucker up -- your butt, that is. Squeezing and releasing your butt-hole recruits many major muscle- and nerve groups, gets a lot of blood flowing, and makes you look like you're at least as nervous as a liar, when all you're doing are some rhythmic bum-squeezes. As a side bonus, do it enough and you will have BUNS OF STEEL.””