Disclaimer: I am definitely not defending the whole sex dealership thing, I am just wondering about what a 19 or 20 year old college student is supposed to do to behave legally.
Edit: as a comparison, in Germany the age of consent is 14 afaik and there exist several additional laws to protect, e.g. 15 year olds from older people that have some kind of power over them (e.g., teachers).