Shoes without strings make matters plain.
You would not have to tie the knot
when bowing deep becomes a strain,
but shoes with strings are all you got.
No strings attached means you are free
to decide which way to go:
maybe just on a shopping spree
to buy shoes while the price is low.
More often though the lack of strings
is metaphorically meant:
attaching no unpleasant things
to what you see as heaven sent.