marsman: FFF and Fullwings are closer to the mark about what actually happens with most attempts at crab landings- whether intentionally or not. This is particulary true of the majority pilots. However the initial intention is for the landing to result both main wheel touching down at the same time, tracking the runway centreline.
Regarding my earlier post supercruise593 is correct regarding the "kick straight" part, after the initial "kick" most students would try and land normally, then wonder why the squeeling was occuring, as the aircraft weathercocked back into wind, and landed sideways.