In Guess Who you can ask any yes or no question so you can feel free to ask if the person's card is a boy or a girl. This question can be a useful strategy for narrowing down the options and helping players make an educated guess. By asking about the gender of the character, players can eliminate half of the potential options and focus on a smaller group of possibilities. In the older Guess Who game there were far more boys than girls so often this question would be banned as a "house rule" however, modern versions of the game have a much more equal split of boys and girls so you can feel free to ask this question.