Surely Barry Manilow (beautifully described once as 'like looking at yourself in the back of a spoon') would have fallen over.

If you are walking forwards and some one was to attach themselves to your member then, unless they are on heels or a trolley, it would be quite tricky to make forward progress. Except if your friend was very short and was competent at walking backwards smoothly. Goodness knows what would have happened to Barry if she'd bumped into something.

Perhaps he wrote this in anticipation of the moment? If my memory serves me right he wrote -

Oh Mandy
You kissed me and stopped me from walking
But I fell anyway.
Oh, Mandy well,
You gave and I came without talking
I need you today
*sigh* Ohhhhh Mandy