I remember me mam, bless her, also asking me what this obsession with 'hoovers' was about 5 years ago ha ha!! 
I had it 'hoover' club flyers on my wall, 'hoover' posters....I was having endless discussion with friends on the phone about hoovers......she even noticed my copy of Stimulant DJs 'Hoovertime'.....must have thought I was completely barmy, lol 