[Npl]

I guess you know the common line "Opinions are like *rearends* - everyone got one". Everytime I hear this I have to counter this with lines such as "Roses are red" or "The Sky is blue".
I think the most important punchline is missing, like "... and all stink", "..., and some stink more than others (and your`s the most)", "... and its unpleasant to dig too deep in others", "... but you only care for your own" (I know a few people will oppose the last two ). The line alone just lacks any wit, purpose and is open to interpretation.
Funny that alot of people even have no clue what they are trying to say with that line if you question the purpose. So how would you interpret it or complement it with a punchline?