Orphans actually have an advantage. Nobody can call them motherless or test-tube babies in an argument.
Orphan's Advantage
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Explanation
Experiment
Explain Bear
Listen up, buttercup. The joke here is that orphans, because they don't have a mom, can't be called "motherless" as an insult, and since they lack parents, they can't be called "test-tube babies" either. Get it now? It's like saying you can't insult a bald dude by calling him "baldy".