Between blotch and blok

Just out of interest, dear reader, have a question or two:

1. Is your earworm only occasional or pretty much constant?

2. Are there triggers that start your earworm?

3. Can you hear more than one track simultaneously?

4. Does your earworm play you particular tracks or arrangements of whatever tune it wants to irritate you with?

5. Does your earworm have a playlist?

Or, do you not have an earworm and not understand what the heck I'm going on about?

(For extra credit, what is the cure for a month-long infestation of early Chris de Burgh?)