5 Seconds of Summer’s bass player now has a viral penis — which is not as bad as it sounds — but yes … his junk’s being passed around the Internet after he flashed it on Snapchat. Calum Hood learned a hard lesson when he sent the revealing video to someone who then reposted it as a Vine for the world to see. Even though you never see 18-year-old Hood’s face in the video … he actually admitted it was him, tweeting …”I’m still just a teenage kid learning from mistakes.”