Its important to keep in mind that few children of any age are really very much interested in asking their parents about the mechanics of oral sex and the chemical composition of dress stains. Even if their questions come at you in this form, what children are really trying to sort out is how Bill Clinton's behavior, and our reaction to it, fits into their developing moral view of the universe. Rather, understand that what your child is really trying to figure out is what is right and what is wrong, what is moral and what is immoral. How you should answer these questions depends upon your child's age. Preschoolers are mostly concerned with whether or not a particular behavior is likely to be punished or rewarded.
Preschoolers assume that good behavior gets rewarded and bad behavior gets punished.
What they believe is that bad behavior should be punished. They still have to clean up the mess. So, they reason, it should be with Presidents. To suggest otherwise will only be confusing to them. As children enter the elementary school years, the preschooler's orientation toward rewards and punishments is replaced with a concern about rules.