In issue 98 of Superboy, Ultra Boy comes to Smallville. He has many powers, but his flaw is that he can only use one power at a time. He also doesn’t have x-ray vision, it was called “penetra-vision.”
Instead of telling me about this issue, Ash just showed me the cover, which depicts Ultra Boy and Superboy using their super-vision to see through each other’s clothing. My husband insisted that if they were really teenage boys with x-ray vision they would be looking at Lana Lang!
(Drawing by Fanboy Wife, based on a picture by Curt Swan.)