I don't really see why someone would want it.

Perhaps you, or your friend, put a long playlist together for a party, and the next morning you want to play the good bit of the evening's music again. You remember that "State Of Independence" got everyone on the dance floor, and the next few songs were great too and fitted really well, but you can't remember what they were. So you want to automate the process of skipping forwards until you get to the "State Of Independence" bit.

Peter