Two things I did as a kid:
1) Played a lot of video games.
2) Wore super hero tighty-whities.
Now, I’ve traded in the briefs for boxers long ago, but the above might make me rethink my stance, as it features the fire breathing piranha plant from the Super Mario series*. At least, it would if it wasn’t positioned so that the plant looks like it’s going to bite off your, how shall I say… Little Luigi. Yeah, we’ll go with that.
Currently, the undies are sold out at Etsy, but write the seller and maybe you can get him to make some more…
[Etsy]
*I’m assuming not everyone has the instant visual recognition of video game characters that I do.