Behold: a shirtless Calum Hood lounging around in this Instagram pic. 5 Seconds of Summer are hanging by the pool -- a perfect place for Calum to show off his tats.

"you have cool tattoos sir," the band tweeted, sharing the candid of their bassist. Calum sports his Roman numerals tat and many others, including a feather and a guy in a native headdress.

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The guys sure don't have any tattoos of their own lyrics. They pretty much swore them off during their "Live from MTV" episode.

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"It'd be pretty tragic really," they said. "I mean some lyrics are really good but wouldn't it be really weird to have your own lyrics tattooed on you?"

Related: 5SOS’ Calum Hood Is Now ‘Scared Of Females’ After Watching This Movie.