Final answer:
Researcher Amy Schalet found that Dutch parents allow their teens to have sex in their homes and monitor their behavior, while American parents do not allow sex in their homes and do not communicate openly about sex.
Step-by-step explanation:
In a study of American and Dutch teens, researcher Amy Schalet found that parents of Dutch teens allowed their children to have sex in their homes and monitored their teens' behavior. American parents, on the other hand, did not allow their children to have sex in their homes and did not communicate openly with their teens about sex.