A Summer Place - 1959 film that crossed into the early 60s and reflected the changes teen girls were exploring in that era. The girl tries to resist her boyfriend, but as you can see from the poster she has a lot of pressure to have sex.
Rizzo: A crooning high schooler sings about "There are Worse Things I Could Do" as she struggles with an unexpected pregnancy & a tarnished reputation. (Grease, 1978, Randal Kleiser. Portrayed by Stockard Channing).