i'm assuming these boots have lifts in them...
I believe that Lanois (on the Making Of...) also said that Running to Stand Still was another of those "one take" tracks too (like Bad was).
With most of the "one take" songs that U2 talks about, what they really mean is that the music is usually only played through once and then they cut and paste and piece together a song out of a jam. While there may be a good start on lyrics in with these jams the actual vocal is usually recorded later, although sometimes some of the original vocals are left in for extra layers or backing. I think they had said at one point that MOS was from a 30 minute jams session that they edited down into the song but the band did not play the music again. This is one of the reasons that U2 often talks about having to learn the songs for the tour. Sometimes it is because the songs are actually created through cut and paste and have never actually been played as a song.
Dana
Yeah, that's closer to what I was thinking.
Lyrically, this is a quintessential U2 song: there are two sides to it. The sexy/romantic love/rock n' roll side is a campy, kinky, ode to sexy boots. The moral/religious/political side is a call to arms, to strap on your boots, and get ready to get to work.
Most of U2's lyrics have something deceptive.