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Yes it can. Semen appears a pale greenish yellow under a blacklight, just like most white things glow bright purple. Clean it up before you invite your buddies over to show them your new black light.

No. I own a blacklight and something that produces semen; I can attest that my semen does not glow any color before or after it has dried.

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โˆ™ 2011-08-17 05:56:50
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Q: Can a black light detect semen stains?
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