Rebecca De Mornay in Risky Business (1983)

Trustworthy son Joel Goodsen, an industrious, college-bound Chicago high school senior struggling to live up to his parents’ expectations, has more than enough on his plate. But when mum and dad go off on vacation, the inexperienced teenager seizes the golden opportunity to live a little: Joel breaks one rule after another, indulging his wide-eyed curiosity and unspoken desires. And now, there’s no turning back–Joel’s risky business has already thrown his life into complete disarray. What happens if Joel’s parents return home earlier than expected? Will Joel learn a thing or two about life, consequences, and love?