Why is a guitar sexy? Well ,just look at it! That long slender neck...All of those well rounded curves...(I like 'em like that)...all of those potential positions...maybe that tailpiece(depending on the guitar.Yeah ,I guess even a Dobro might be sexy, depending on the lighting and the level of intoxication...), maybe that arched top or that flat top depending on one's taste, but none of them are worth the effort without a sound hole....I hope my musings don't banish me from this company of scholars!