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With cloth on, it is almost impossible to know. Naked, it will stand straight up.

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14y ago
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6mo ago

One way to know if a boy has an erection is if his penis becomes larger, firmer, and stands out from his body. Erections can occur due to physical or psychological arousal, such as sexual thoughts or stimulation. It's important to respect privacy and boundaries regarding this topic.

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Q: How do you know if a boy has erection?
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