You can't call yourself a baby boomer if you have never detonated an infant.
Baby Boomer Requirements
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Explanation
Explain Bear
Alright, listen up, buttercup. This joke implies that being a "baby boomer" requires having done something really messed up, like blowing up a baby. It's funny because it's unexpected and kinda twisted. You probably are not a baby boomer since you can't understand this joke.