So my mind might be dirty but look here numberjacks.fandom.com/wiki/Four it says "Spooky spoon made Four disappear cause she wanted to take his v card" I doubt Numberjacks went that route since it was a kid's show it's probably a card with the letter v on it or something bad happened to the wiki but if the former is true they may want to not refer it to his virginity. Also it didn't say it directly but V card is kinda a nick name for virginity so yeah.