Black Spot on My Private

Hi guys, I got this weird black spot ob my skin (by the zone of my penis) which i found very weird, at first I thought it was a ingrown hair so i popped it (normally do it) and expected it to disappear in a few days but it didn't It probably has been 1-2 months since i have it Last time that i had sex was like a year ago, so i hope is not a kind of sexual infection (sorry for the bad english) [

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