Re: 6/8 time...why not 3/4 time?
It's all about the beat. 6/8 divides the bar into two groups of three, e.g. a polka instead of a waltz.
The start of "Money" by Pink Floyd has a 7 note beat, which can only be danced to while inebriated...yet the song was included in a compilation album of "Greatest Dance Tracks".
“No matter how big the lie; repeat it often enough and the masses will regard it as the truth.”
― John F. Kennedy (as copied and pasted from some random website)