Technically speaking, "ur mom/ur father" jokes have no effect on orphans.
Orphan's Rebuttal
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Explanation
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Explain Bear
Listen up, buttercup. You see, "ur mom" jokes are funny because they usually imply something bad about someone's mother. But, like, orphans don't HAVE parents, genius. So, jokes about "ur mom" or "ur dad" don't even register. It's like trying to sell snow to an Eskimo, which is a very outdated term by the way, you probably didn't know that either, right?