I ordered andouillette in a Paris restaurant once not knowing what it was. I had a little dictionary with me (pre-internet) that translated it as "chitterlings". I didn't know what that was either.
Never again - it had chopped-up bits of rubbery guts on it that resisted chewing, it was vile.
First-hand testimony: yes, it does taste of soap. Lick a bar of soap if you want to know what it's like.