Bogeyman is a common allusion to a mythical creature in many cultures used by adults or older children to frighten children into good behavior.

To obtain Val'Rhammaghe aka Boogeyman, type in console:
help "Val"
player.placeatme "id" 1
addtofaction 5c84d 1
setrelationshiprank player 4
disable
enable
Then talk to him and he should now have the dialogue option to follow you.