Because they have no soles. Joke my fiancee just said to me.
Who cares
Shh I'm undercovers
He had no arms. Sorry that joke was stupid, let me try again. Knock Knock "Whose there?" Not Billy
Who gives a cluck (I wonder if the moderators will censor this joke merely on the grounds that it is categorically terrible )
Fiancee.
Because they have no soles