Thesis: Being a good role model is important because younger siblings and friends will often model their behavior on yours. Topic sentence 2: Friends will often model their behavior on yours. Which details develop the point that friends will often model their behavior on yours? Check all that apply. Teens often do what their friends do. Many people never have a good role model. You often see friends dressing in similar ways. This semester I made all As. When my friend Russell found out, he swore he would get all As next semester. Friends often will model their behavior on other people.