Tattoo knowledge? Evan didn't actually have a lot of that, just that he thought that they looked really cool. But he did remembering from his piercings the shop talking about how important cleanliness was, so he raised his hand to offer remarks on that and waited until it was his turn to speak. "It's really important to go to a reputable shop when someone wants to GET a tattoo. The art is important to like, but even more so you can look up health records for shops to confirm they are good on cleanliness of their needles for the ink and sanitation for the stations. This is really important because you CAN get infections from an unclean space."

Not that friends couldn't be clean too but... he'd rather stick to shops.