Yesterday I posted a bit about sexual anarchy.
It's nothing new in human cultures. It's been around forever. It's not culture that becomes sexualized, it's human nature. I think my point was that when you place mixed sexes in close proximity, really regardless of age, chemical things happen for a hundred different reasons. Often with unfortunate consequences. Work, home, school, wherever. More so today with coed campi and many women in the workforce.
Truth is, it can be overstimulating for both men and women. Overstimulating, and too easy for the weak of character and conscience.
My advice from such experience: Guys, if you desire your family's au pair, get rid of her. If you can't take your mind off your receptionist's body, get rid of her and hire an old lady.
This is why everybody needs his or her own code of behavior, and his or her own boundaries. No need to invent one's own because many smart people have thought about it already. God, too, as a gift to us.