That's not quite accurate.
parable, n.
Pronunciation: Brit. /ˈparəbl/ , U.S. /ˈpɛrəb(ə)l/
Forms: ME pable (transmission error), ME parabele, ME parabil, ME parabol, ME
Etymology: Anglo-Norman and Old French parable...
1. An allegorical or metaphorical saying or narrative; an allegory, a fable, an apologue; a comparison, a similitude.
allegory, n.
Pronunciation: Brit. /ˈalᵻɡ(ə)ri/ , U.S. /ˈæləˌɡɔri/
Etymology: (i) Anglo-Norman and Middle French allegorie
1. The use of symbols in a story, picture, etc., to convey a hidden or ulterior meaning, typically a moral or political one; symbolic representation. Also: the interpretation of this.
metaphor, n.
Pronunciation: Brit. /ˈmɛtəfə/ , /ˈmɛtəfɔː/ , U.S. /ˈmɛdəˌfɔ(ə)r/
Forms: α. lME methaphor, 15 metafor, 15–16 metaphore, 15– metaphor.
Etymology: Middle French metaphore (c1275 in Old French as metafore ; French métaphore
1. A figure of speech in which a name or descriptive word or phrase is transferred to an object or action different from, but analogous to, that to which it is literally applicable; an instance of this, a metaphorical expression.
The key word in all of these is 'interpretation'. Ergo; you suck.