What type of sexuality-related questions are the most common for children to ask first?

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The question "Why do boys have a penis and girls have a vagina?" is a common first question about sexuality that children ask. This is because it is a basic inquiry about anatomical differences between males and females. While questions about periods, birth, and kissing are also common, they tend to come up later in a child's development.

What Type of Sexuality-Related Questions Are the Most Common for Children