Point taken. Also if he were real, he'd probably be a fan of The Beatles, because of his voice and hairstyle, just like Jess Harnell (Wakko Warner) is a fan of John Lennon & Ringo Starr, the two Beatles Wakko's voice is patterned after.
Well, he might not be actually. Remember if they were real and the tv show was not just a tv show, but just recordings of their everyday lifes, he would not have ever been to Outerspace where the Beatles were known. Where as Wakko is a 'silly creature' of outer space who grew up on radio there
. Unless the Land Of Carpets thingie happened once before when he was little and his parents saw a picture of that hairstyle...or any picture from that time really, I think the hairstyle was even bigger than the music in places ....
As for egg colors I think fraggle eggs are earthy grays, silvers,blacks, and blues to blend in with cave rocks and water so they don't get eaten by bigger animals