Sinister: Who's the idiot?

[Butch Sweaters]

I'm wondering what anyone makes of the last line of this part from "The
Rollercoaster Ride":

*A puzzle, for the moment settle down to do it with him
You're happy cause you're cozy and the rain comes rattling in
It tickles, and it's something that is very good for the skin
You're waiting for a baby, Baby, watch the idiot running*

I love this because it's got all the sexual frankness and ambiguity of
meaning that I love Belle and Sebastian for, but I can't quite figure the
last lime, i mean line, out. Who's the idiot? Are B&S saying that they're
with Momus when it comes to babies? (viz: "His Majesty the Baby"). Anyway,
it's a beautiful verse, I was just wondering if anyone else had any
impressions...

Love love love,
Butch Sweaters himself

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