Watch the Not Inside Woman Blues online guitar lesson by Jeff McErlain from Blues Guitar Fakebook: Rhythm Vol. 2
As we can see, people have been remaking blues tunes for ages. In fact, many of the original blues tunes had similar themes that were borrowed and shared, melodies as well.
This one is basically Cream's take on "Outside Woman Blues". The song was originally recorded in 1929 by Blind Joe Reynolds. This version is what Cream played on the classic record Disraeli Gears.