I recall this much from National Service evening sing-songs in the NAAFI in the 1950's :-

I had an invitation to my aunt Flo's for tea,
She was very glad to see me and she made a fuss of me.
We had cakes and bread and butter, and winkles in a pan.
She asked me to have some - that's when the fun began.

Oh I said I can' get my winkle out, isn't it a sin
The more I try to get it out the further it goes in cor blimey
I can't get my winkle out isn't it a stuer.
I can't get my winkle out. Anybody got a skewer?

My auntie shouted Murder! This man assaulted me
She called for a copper, and he arrested me.
I was taken to the station and charged without delay,
The Magistrate he said "Young man,- What have you got to say?"

Oh I said -

I can't get my winkle out etc, etc

Anybody out there know the rest???