I think it’s in the 80’s but it could also be in the early 90’s movie. All I can remember is there are gang of teenagers or grownups chasing a boy and a girl. The boy and a girl entered a house/building to hide from the gang. While inside, they decided to have sex and lost virginity. I think they didn’t finish having sex because the gang is approaching the house/building. They run again. That’s all I can remember. Please help!