perhaps a lady shave is a depillatory of some sort with a (speaking of hair getting tangled) with a rotating spring that grabs hair and pulls it out by the roots....i wonder how such a device could be invented or marketed by civilized society??
here is an alternative hair removal method..

http://www.videojug.com/film/how-to-thread-leg-hair

or this against the grain method
http://www.youtube.com/watch?v=LzQ_sPZd_jI