Spring was never waiting for us till...

[Villavic]

I always wanted to ask this. Does anybody know about the meaning of Mac Arthur's Park lyrics?
I mean, where it says:

someone left the cake out in the rain
I don't think that I can take it
'cause it took so long to bake it
and I'll never have that recipe again
Oh, nooo!

Is there a hidden meaning of that? Because talking about a cake left in the rain.. is not so nostalgic or romantic.. it's weird.