I like the way you think, thanks , It now makes me think!I saw this as a sort of theme to be honest. I liked how it featured in three songs.
I almost wonder if the three songs it feautured in were sort of three different reasons why his feet weren't touching the ground (gotta laugh at saying it like that).
Strawberry Swing seems to be for his kids.
Life in Technicolor 2 talks about love - aka as his wife.
Now My Feet Won't Touch the Ground talks about "boys" and must be the band probably. Meaning they keep him above the ground too.
So the idea is really just love but on three different levels.