I always thought Whorehouse Blues was a variation on a standard blues theme to be honest. Another example of a slightly diiferent blues theme being 'shared' is Jesus Just Left Chicago (ZZ Top)

http://www.youtube.com/watch?v=jV5ioewi4pk

and Ride On (AC/DC)

http://www.youtube.com/watch?v=xpoY_Bs8Wy4

Or Night Prowler (AC/DC)

http://www.youtube.com/watch?v=I6TzeuxwO7A

and I Won't Cut My Hair (D.A.D.)

http://www.youtube.com/watch?v=7I3kWSBE5qo